The terminology of 'self-custodial wallet' would be a step forward, or even better, just wallet or signing device.

Non-custodial also implies that I don't have custody of my bitcoin, it confuses me every time I hear someone say it. A custodial wallet is also ambiguous, e.g. "my Coldcard is a custodial wallet, I allows me to have custody of my bitcoin".

If anyone should want to associate a bitcoin account on someone else's computer to a wallet, it would be less ambiguous to call it an other-custodial wallet, or even better just stick with 'bitcoin account'.