Part of my framing for the assessment was "everyone in my family uses 1P and they're happy with it, will this be good enough to convince them to switch." While I ultimately can make the call for the switch, user experience is very important when you're trying to get elderly parents to do something new.
It was not to be.
Aside from the generally poor UX, Bitwarden's clients (on linux, mac, windows, and ios) were also dramatically slower (in every way, from search to login), had fewer features (sorting passwords, favourites, good organization tools to name the most glaring omissions), and I found autofill far less reliable.
I've taken great issue with 1password's way of doing business and dealing with customers over the years. Sadly, and with some regret, I went back, because a password manager (really a secret manager at this point with so much more than passwords in it) is so central to daily life, I feel that I need one that is as as painless as possible.
I wasn't one that used Bitwarden because it was open, I tried to use the best password manager possible.
However, I LIKED that it was Open. And Vaultwarden is a gem. Wish I had the time and skills to make a better front-end for it really.