I’ve seen a few companies recently that seem to be getting strangled by the long tail. They have large numbers of low paying, price conscious customers draining resources. They can’t raise prices to a level that enterprises would be happy to pay since this would kill their established customers. Enterprises don’t want to pay a different higher price, why would they. The companies usually skimp on sales, especially field sales, so they have trouble competing in larger deals. And they can become arrogant that their niche solution, while better at one thing, can take on larger platforms that solve multiple problems.
Not saying your points are invalid, just that there seems to be a bit more at play and going from the long tail to the enterprise doesn’t seem trivial and shouldn’t be an after thought. In B2B it does seem like all the biggest winners have generally nailed the enterprise, but not necessarily the long tail.