Honest question - is this due to professional requirements, or is this like a masochism thing? I just don't understand why you'd go through the trouble willingly.
I don't use it for everything but one of the nice things is that it is easy to concentrate on something. No chance of procrastinating by opening facebook :)
And as a debugging / recovery tool it's sometimes handy, when the whole GUI side is crashed I can still kill some processes. Sometimes I can't switch to a text CLI console even.
And the retro feel simply appeals to me. I know it's not for everyone.
I've actually been thinking of making something like a modern terminal. Like a Raspberry pi with an SSH client in baremetal so it boots really quickly, with easily switchable font sizes etc. But it's too much work I don't think I'll get around to it. Maybe I'll skip the baremetal part and just go for fbterm on a really cut-down Linux distro, that might work.
Lynx works over m.facebook.com, and slashem/frotz is a great time waster :D. Once you play slashem as a doppleganger monk, or play Anchorhead, Spider and Web, or Slouch over Bedlam under Frotz, that stance is not taken as granted.
Whoa.
And there's the software too: the buggy Hyperterm (except the private edition), Procomm, Minicom... These days I use Knossos' dterm ( http://www.knossos.net.nz/resources/free-software/dterm/ ).
I mean, laptops, sure. But PCs I think most still have a COM port. I bought a "gaming" X570 motherboard recently and there's still a COM header on it, I'd need to buy the port itself but the mobo does support it natively.
One reason against would be I guess the VT200 is a lot less pleasant to look at than an average display device one has laying around in 2020?
The terminal bell makes an audible beep, i use that to signal stuff happening in IRC.
Probably because its a CRT, it also doesn't inhibit me from getting tired in the late hours like a phone or laptop does.
Last but not least, the hackability: You can interface the VT via uart, and thus can use it as user interface to an arduino or other retro computers. KVM-like switches are also easy to DIY for serial connections.