I used to have one of those style modems for my TI-99, back in the day!
The issue isn't so much of a problem in-that my Internet is broken and like living in the mid-1990s again*. My comment was more about the failure mode. If a user upgrades MC, it now "slurps in" all of your old settings. This is new compared to previous versions. Before, you could migrate settings if you wanted to, but you weren't forced. Now, you are.
And, unlike ROHQ, for example, where it is only part of the product, MC22 will not start for me at all. I get a big, blank, black box with no UI. And, worse, I have literally NO resolution to this issue available (save manually editing the registry after the fact). I tried uninstalling MC22 and reinstalling it. No joy, same black window, because it "upgrades" itself again. I get no feedback about what is wrong. Nothing but a hung, black window. Not a good failure mode due to a download in progress, if indeed that's what is happening. And this would apply to machines that have no, or limited, Internet connections as well, not just weirdos like me living in the dark ages (on a laptop away from wifi, for example).
I guessed (and am still only guessing about the Chromium thing as I haven't yet tried again) it was some setting in there that was causing it, but there is now no way to "reset" MC back and force it to NOT upgrade old settings, unless you remove the old version (and all settings) too. I could (and did) uninstall/reinstall as many times as I wanted, with no luck. The auto-crash helper wouldn't help (it doesn't have a generic "reset all settings" option) and uninstalling wouldn't help. My only "normal human" choice would have been to also remove my working copy of MC21. But most mere mortals wouldn't try that. They'd abandon MC22 first!
* It isn't quite that bad, FWIW. When I get network access, it works and I get between 0.7 - 2mbps. The issue is that my connection doesn't stay stable. I can load web pages (secure ones give me trouble), but for stuff that takes a minute or three, the connection often fails and resyncs a few seconds later. So, the 1 1/4 hour download wasn't, of course, one download. It was 4-5 failed downloads followed by one mercifully successful one.