I understand why vendors believe this. But I had my share of purchasing discussions when I worked in Enterprise IT, and this was a factor in our decision-making literally zero times.
But we never told the sale guys that when they put a bunch of logos into a presentation. We smiled and nodded at all the crap they threw at us, and then promptly ignored 80% of it and discussed the 20% that really mattered behind closed doors once the sales guys had gone home. And most of the time, it was an analysis of many factors, including how well their capabilities matches our needs, whether their pricing was cheaper than the "build" option with internal talent, and how low-maintenance it would be. We loved buying solutions that affordably provided direct solutions to business needs that did not impact the work of IT department at all. That is why SaaS has taken over, BTW... not because the solutions are better that what could be built internally, but because it lets the internal IT shop just get rid of one problem, so they can spend their time on other problems.
That is truly how to hit product/market fit for an Enterprise product. Just make a problem disappear for the IT folks, and they'll buy.
It's more prevalent in certain industries than others, and some IT people may have more sway than others, but inferring that logos aren't valuable is a terrible take.
We needed to know that it could do what we needed it to do and that there were enough support resources that we could get someone on the phone if we had an emergency. It is not cheap to integrate new software into the systems and processes of a large company so we also needed to know that we weren't going to put in that effort and then have the company go under a year later.
Support and stability were the two biggest issues that limited adoption for early stage startups. We didn't care if you had any big name customers. We just needed to know that your product did what we needed and you'd be able to support us for the long term.
Most people who know what they're about will also know that companies sometimes pay to have other companies use their product, just for the logo on the presentation. Or that it could just be used in one little local office of a multinational. Or that it's just shelfware, bundled with whatever it is they bought that they actually wanted.
Everyone else thinks, "Oh wow, X are using it? Must be good!" And it grabs those people as customers. And that's why it's done.
There's a big difference between what a product does in theory vs in practice - and social proof is a big guiding factor for what it can do in practice.
I believe this (i.e. credibility) is a necessary, but not sufficient, requirement in B2B sales. If a company/product doesn't establish enough credibility it won't even be considered for further discussions/approval in many cases. It seems that in your purchasing experience the credibility criteria was already met, so your team didn't even bothered to review the "many logos" slide from the sales pitch.
Many B2B startups (including my own mobile market research startup) struggle to reach this credibility threshold. It's a critical factor for scaling sales. Most big companies aren't willing to buy from a startup they've never heard of, no matter how great their product is.
I'm curious how that gets evaluated, is it more of a ballpark estimate or is there a more formal process involving engineering teams providing time and effort estimates?
1: https://firstround.com/review/how-superhuman-built-an-engine...
Superhuman is not a b2b purchase but more of a prosumer purchase, so the framework works really well for them.
From the linked article, I'd say the "what's missing" question is perhaps the best signal, if customers list tons of missing things yet continue using the product despite those shortcomings, as measured by usage stats for instance, then you know you not only have PMF but also the beginnings of a lock on the market.
Strongly believe that you should ask for payment - until then everybody gives nice feedback. But the proof of the putting is in pulling your card/checkbook/Purchase Order out and eating the pudding.