Compare
https://www.crunchbase.com/organization/secondlife
https://www.crunchbase.com/organization/vrchat
They were well ahead of their time. Or even if they weren't, the market simply wasn't ready for them.
As an aside, I have a few anecdotes about Second Life:
- I remember IBM paying money for virtual real estate in second life. They set up a marketing presence, too. It seemed like such an IBM thing to do.
- My university was giving class credit to a grad student for building a virtual mock up of our campus in Second Life. It was a thesis project, I think. I remember thinking he was rather late to the game, as Second Life had already dropped in popularity versus MMOs such as WoW.
I wonder what those events would have been like today, with VRChat and the emergence of the "metaverse". Everything old is new again.