Who will pay a subscription
Dunno if for other people, but that's the main issue for me. When you pay a subscription, at least in my mind trained in the 90s and early 00s, plus now with Enshittification, you are not only basically paying rent to a landlord, but you are basically paying a "ransom" – a bet that the service won't be rug-pulled from under your feet at any moment's notice.
Instead I'd prefer something like a one-time lifetime payment, like what SDF does, or a long-period subscription eg.: 5-yearly or 10-yearly instead of monthly / yearly. That way, even if it's going to eventually be Enshittified, you have better reason to trust that you're going to get some useful lifespan out of it.