I like this. It merges well with a nsec seed wallet, that generates new accounts per use.

Think I heard it from nostr:nprofile1qqsyvrp9u6p0mfur9dfdru3d853tx9mdjuhkphxuxgfwmryja7zsvhqppemhxue69uhkummn9ekx7mp0qythwumn8ghj7anfw3hhytnwdaehgu339e3k7mf0qyghwumn8ghj7mn0wd68ytnhd9hx2tch2deau last spring.
nostr:nevent1qqsz4cr5tn3ce3c3l9t40hgjp9fkjnp0h5p6muxh2acmpdwt5jmg9nspz4mhxue69uhhyetvv9ujuerpd46hxtnfduhsygyhcu9ygdn2v56uz3dnx0uh865xmlwz675emfsccsxxguz6mx8rygpsgqqqqqqsrkdq99 

 Agree. Some folks are too tied with the idea of having just one key. 

You can and maybe should use different keys for different interests, different chats, different communities, etc.