When I feel I’ve outgrown the current one, or broken it, or there’s just an amazing deal on something new, but generally they come though upgrades.
My attitude now is to just buy a frame and move components across. Brand new bikes are poor value considering the price and rapid depreciation. Ex-demo and last year models are better. Though generally I find a whole bike doesn’t have the components I want.
Have got thoughts on a fork upgrade for the hard tail, but because it’s a through axle that my wheels won’t take, it means new wheels and that’s got me thinking 650, so… new frame, wheels and fork 😀
But really, I’m happy with what I’ve got in terms of frames, and the bouncy bike is a keeper for now, with pretty much all the components are what I want or need.