I see nothing wrong with using a plaintext file on your computer, that’s likely going to be safer than using a cloud based solution for a desktop computer that

I see nothing wrong with using a plaintext file on your computer, that’s likely going to be safer than using a cloud based solution for a desktop computer that only you access, especially if you don’t have remote access. Important questions might be how secure is your computer (encrypted HD, multiple users, etc), what incoming services have you enabled (ssh?), does your computer ever travel (is it a laptop, is it prone to loss or theft), and how secure is your apartment/house (is a robbery plausible). The main thing a desktop file is, for most people who use password managers, is inconvenient. Without some kind of remote access at home, it might mean not having access to passwords when doing errands or traveling, any time when not physically at home. But with remote access, the password file access does become riskier, that does become cloud access where you’re responsible for the security of all methods of remote access (are any ports open you don’t know about?). Having my password manager on my phone has been incredibly useful at times.