Mail is a pretty awful client imo, but still better than most other. Canary and Airmail however are absolutely amazing (I recently switched to Canary from Airmail) and there really isn't anything comparable on other platforms.

Mail.app is an appalling client. Having recently switched email providers, I tried copying several thousand emails from one mailbox to another. Mail would invariably crash after moving several hundred, and then could not be restarted without immediately crashing. I lost count of how many crashes I reported to Apple (aside: has anything ever come of these reports?). Mail is so bad, it did what I didn’t think was possible - I switched to Outlook. And guess what? Outlook handled me email-moving task faster and without error.

Internal quality control for macOS and built-in Apple apps has fallen off a cliff in recent times. Catalina has been disastrous in that regard. Having used Macs since OS/X Leopard, I’m not jumping to Big Sur. I switched from Windows because it was a buggy, hot mess. I’m not hanging around and risking my work as macOS quality control keeps falling. Apple’s developers have lost my trust.

I once had a similar need but outlook failed me hard, never tried with Mail.app but I'm sure it won't go well. In an ideal world i would just make all software i use myself cuz I've only seen like <10 actual good softwares in my life

> Apps shipped with macOS are actually good imo, ...

As long as your standard is low, sure. Scanning with Image Capture results in needlessly large files and it has turned to be quite a piece of crap. Moved my scanning pipeline back to Linux, and now, I've got text recognition for free !

Some are good. But many have better alternatives. All mac apps leech your data to the cloud though. And that should be a huge no from all of us.