From my experience the more exotic frameworks are often pushed at smaller companies by developers hoping they'll be hard to replace whereas big companies use what s most popular to ensure they can find replacements easily.
Basecamp has been around for ~20 years. I have a lot of confidence that it'll be around and supported because it's a substantial part of the stack involved with a real world application that is their primary business. It's also from a group of folks who have an impeccable track record for supporting the tools they use.