@moody as I recall it didn't keep up with scale due to process launch overhead, which was quite bad on busy websites running Apache 1. Once the tuning guides said to use what became the apache pre-fork model it was the beginning of the end.
And then a few security incidents and the fact that keeping idle telnet, ftp, and finger daemons running was no longer a significant resource drain sealed the deal.
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!