I can’t imagine them supporting telco gear. The IPv6 thing has me LOLing because I just had a similar experience with a vendor where we don’t route IPv6 in that segment and even if we did, it shouldn’t break. Similarly, a vendor in a space they don’t belong that I imagine we bought because of a golf game.
A thing I dread is a product we’ve adopted being acquired… and worse, being acquired by someone extending their brand into a new area. It’s also why we often choose a big brand over a superior product. It’s not the issue of today, but when they get bought and by who. I hate that so much and not my decision, but it’s a reality.
It’s also a terrible sign if you’re dealing with a real bug and you’re stuck with a sales engineer and can’t get a product engineer directly involved.
I have a list of “thou shalt not” companies as well, and some may be similar where a few bad experiences ruined the brand for me. Some we’re still stuck with and I maaaay be looking for ways to kill that.