This thread surely reflects on the age of RV.net participants. I am 77 so I can make that statement.
Resistance to change is rampant with no recognition of the accompanying loss of benefit in rejecting newer solutions. And newer solutions do not necessarily drop old function, e.g. gmail has a full set of hot keys for those that prefer their use.
Microsoft is simply moving into this better world with their gmail-like web-based email system. I don't like or use Microsoft products (other than the unavoidable need for the Windows platform) but it's simple to see they are trying to avoid being made redundant by gmail and the cloud-based world of like email clients.
Stay with your relic email client but don't try to justify them based on their prior utility. They have been passed by. And not too far down the road something else will come along to supersede current technology