The last time I got tired of this hobby was around 2007 or so.. the guys I worked with had Nitro Revos. Peer pressure led to me also getting one. I went through 2 stock 3.3 engines, got an O.S. engine, ran about 6 gallons through it before I converted it to electric. In the end I had 3 Revos, the mini Revo, a Savage flux, a Mugen MBX5T Prospec, and the MBX5B Prospec, and a shitload of parts. Now I just have the buggy that I converted to electric and drove once.. everything else got sold. I might have enough to build a Revo.. it would be mostly stock though, should have a Robinson steel trans for it buried..
Also have been looking at vintage Hi-Fi.. I was into that before computers and r/c.
Those hobbies are cheaper than computers.. which is crazy.
And they will give you an insane dopamine hit..