I was one of the last ~50 active players on War of the Roses when they shut down the backend. I had a bit over 1000 hours almost entirely in 1v1 dueling servers. Everyone knew everyone else. Tons of tribal knowledge about weird mechanics and glitches, blood feuds, and just generally interesting emergent gameplay within this tiny little niche. Since they shut it down I've been through college, grad school, a couple jobs, moved across the country, etc. and I still miss it. I really wish we'd been given this consideration.
It would be hilarious if in like, 8 years from now, it somehow blows up out of the middle of nowhere and becomes super popular; simply because they opened it up to privately hosted servers.
I don't get why day-1 private servers aren't a thing. If nothing else, it allows them to cast off some problematic customers: the guys in Outer Slobavia with 1750 ping can set up a private server and have a better experience, the chuds can set up their own servers where the gameplay is just exchanging slurs without burdening the official GMs.
I suspect it's about economics; someone will setup a PS with the microtransactions turned off, or not enforcing license keys/accounts, and people will crowd it.