Microsoft Outlook 4+

I'm terrible for never being able to find the 'right' email client. Let's be honest email can be a pain and most of the tools don't help.
I've recently switched back to Outlook for Mac and the new look and feel really works. It's a very satisfying place to work. I also recently moved to Outlook for iPad, this move prompted the Mac Outlook transition. I've in the past found Outlook on Windows whilst feature rich to be ugly and over complex, the latest Mac version insulates us from the vulgar complexity and lets you just get on with the task of dealing with the necessary irritation which is email.
I've been though most and found wanting. Only bug is clicking on 'Categories' in the Prefs crashes the Prefs plane.
Appart from that all good. Calendar integration with Apple Calendar would be good as that's what I use.
Also why does an email app need to be thick end of 1Gb to download?

I am so frustrated at the experience of your software these days - I am a small business owner who has signed up to your cloud storage and Teams. There is not a day that goes by without your aggressive email updates telling me to shut down and reboot so you can update your terribly in your face software. Worse still every month or so you demand I log on again and that then leaves me in a situation of virtual hosility with my computer when - having tried to comply you agresivlly tell me my passwords are not recognised forcing multiple reboots of world/outlook etc. I have every expectation that (because you see the world throuth an entirely tech lens) you will read this as rather quaint and an example of someone who is simply a ludite and serial complainer. I am neither of those things - I am constantly hamerred by the lousy expectation gap betweeen what you promiose and what you deliver. Even something as basic as being able to drop bullets into a powerpoint doc where I need them as opposed to where you think I need them seems a task too far - to which you may ask - why do I stay with you? Because as you well know you habe a monopoly in this market and I cannot therefore work with clients without signing up. I expect zero response to this complaint because that has been the experience of Microsoft for years now.

I know there has always been a bit of animosity between Microsoft and Apple, but can we finally put that to rest by the former actually making a decent piece of software for the Mac...?

I will happily admit that on Windows, this is a good program, particularly if you have to share calendars with people in your team. On the Mac however, this is one of the clunkiest, slowest, and most awkward pieces of software it has ever been my misfortune to have to use, even using shiny-new Macs with uber-nippy processors. Message loading can take an absolute age, sending is a bit hit-and-miss, and the actual start-up time is long enough for me to go an make a coffee after I click the icon. User-confugurability is slowly being removed with each update, there doesn't seem to be any means of sending as plain text anymore (which is still acually useful, believe it or not)... And more than a whole GB in size! A whole gigabyte! For an email program! Apple's Mail app is less than 30MB and calendar is less than 20MB! I could go on, but I am boring myself.

A free program, and even then I feel like I've paid too much.