That one feature may be fast but anyone who ever used Outlook with multiple shared mailboxes, mailboxes over a few years old, archiving to PST files, etc. will know that Outlook Classic could hardly have ever been considered fast.
Although I don't love it and avoided it for many years I've noticed a lot of these issues went away with the new Outlook. I can load and unload shared mailboxes on demand and I stopped worrying about cache mode settings about five minutes after I switched to it.
It's not great, it's not terrible, like most software I use. But I would have always said the same about Outlook Classic.
Bottom line for me is that MS has Classic on maintenance mode and it's only a matter of time before it's gone.
Not every Linux distribution "comes with" Firefox or Chromium. They may be an option on the install disk and may even be part of the default install but they do not have to be installed and there are other choices (e.g. I typically install SeaMonkey because I like the mail client it comes with). In fact I can decide to install Linux on a PC and not install a browser at all. Last I checked it's still hard/impossible to remove IE/Edge from Windows. [1]
[1] Although admittedly the last real work I did in Windows was 7, so please correct me if the situation has changed.
Although I don't love it and avoided it for many years I've noticed a lot of these issues went away with the new Outlook. I can load and unload shared mailboxes on demand and I stopped worrying about cache mode settings about five minutes after I switched to it.
It's not great, it's not terrible, like most software I use. But I would have always said the same about Outlook Classic.
Bottom line for me is that MS has Classic on maintenance mode and it's only a matter of time before it's gone.