I agree it seems like the end of Ruby on Rails. I personally hope a fork will come along as a spiritual successor, because I still love building web apps this way.
Where will we be in 5 years?
Examples:
It doesn't make much sense to use a human language like Ruby and leave so much on the table when you can use a language like Rust or C to squeeze a LOT more out of correctness/types/performance.
Is squeezing a lot more performance beneficial to a business? or is it a small amount of VPS cost per month difference?
It helps to be clear, at least with yourself, about if you're doing something because you can/want to or if there are actual business reasons.