Re: email clients
The amount of "exposure" is really pretty much dependent on how much you directly interact with cyberspace with any of these programs. It's entirely possible to almost entirely avoid interacting with cyberspace with programs like Word or Excel (or PowerPoint or Publisher, too). But the same cannot be said of any e-mail client or web browser. This is why I limit my real concern for those two classes of program for the most part.
And the need for constantly upgraded security (which means updates) is never going away. If anything, the pace is increasing. Just today, on BleepingComputer, is an article about the latest, greatest breach: Microsoft's Windows 10, Exchange, and Teams hacked at Pwn2Own. There's always the next very clever nefarious actor that you need to thwart. It's an endless cat and mouse game.
Brian - Windows 10 Pro, 64-Bit, Version 20H2, Build 19042
There are many who labor under the gross misapprehension that the Constitution is a cage and a laundry-list rather than a framework upon which great things have been and still will be built. Many things that are entirely Constitutional are not "in the Constitution," but are allowed under it.