Mail.app is an appalling client. Having recently switched email providers, I tried copying several thousand emails from one mailbox to another. Mail would invar

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.