Yup, it's definitely appreciated.

And honestly, the only things that draw me to Tuta over Proton are:

• price - €3/month; family plan is €3/person; Proton is $4/month (reasonable), family is $24/month (kind of a lot)
• custom domains - Tuta supports 3 on lowest paid plan, Proton supports 1; I want at least 2 (family + personal project)
• Monero - I like the idea of digital cash, and this is the closest I've seen; I currently don't have any, so not a deal breaker

So mostly cost. But there's a lot of stuff I like about Proton:

• Simple Login
• VPN
• more polished experience
• bridge

I can host my own Simple Login, Mullvad VPN has more locations, and I don't use email all that often anyway.

I'd switch to Proton if they:

• added more custom domains to Mail Plus
• had a Mail Plus family plan (ideally piecemeal like Tuta)

Monero is nice but not a deal breaker, and I'm okay with Proton being a little more expensive due to brand recognition.