What's the future of Kirby?

I suppose you need to define complex.

IMHO Kirby can become challenging when:

  • your website is very large with lots of pages and files
  • you need to have dynamic content on your website

For the first situation, please check this:

For the second situation you can use something like firebase, or if you want to avoid vendor lock-in, an open source equivalent (shameless plug: I’m working on diskette which is my attempt to solve all my dynamic data problems).