I had side projects that died because the market shifted. When I was in middle school, I managed a small website for tabletop RPGs on a very limited market (a small European country), and the community was extremely toxic and kept copying my work and replacing the name in it, so after like 6-8 years of battling, I decided to close it. Now, after more than a decade, I plan to reopen it, uploading again my old stuff there as archives. I still have the domains.