Other - because bad playing (which playing online makes the otherwise-best of games become) is better than no playing (I'd otherwise only be a DM, as I run in-person).
Well, interesting to see the overwhelming (and perhaps expected) high responses are:
Geographic constraints
Convenience
Scheduling constraints
Online play is definitely a great option for players who have moved or where local play isn't an option. Genuine enjoyment of the medium and preference for online tools is lower down, so it would seem there's lots of room for improvement. And pandemic inertia is still a thing but perhaps abating.
In the past, I had several sessions where I was GMing remotely due to illness.Choose as many options as you want: Why do you use online tools to TTRPG?
I found that for me, and my group, it's considerably slower, due to communication issues, and worse with the VTT up instead of just a dieroller. Without body language and facial expression, it's much easier to miscommunicate.Other: Speed. Playing over VTT is much faster, especially if you are playing a dice-heavy game like 5E D&D. Resolving multiple rolls per turn, with multiple dice and multiple turns per round, is just so much faster when you can just click a button.