And there's also the problem of using computers that aren't yours. I haven't tried (and I will never), but I imagine switching between layouts is at least very inconvenient.
Dvorak is supported by almost every computing device under the sun today. Old Apple models (I want to say the IIc?) even had a hardware button to switch layouts. Switching between Dvorak and Qwerty is usually an easy to find User setting. (If doing it on someone else's user account, you just have to remember to be kind and switch it back when done.)
As a Colemak touch typer I envy that some days. Colemak is available easily everywhere but Windows. macOS, iOS, Android, and Linux all have it similarly out of the box with Dvorak, but Windows it still requires an install and that install still requires Admin approval because keyboard layouts are needed by kernel-level drivers. But I knew that when I switched, took a few years to realize there's no shame in hunt-and-pecking on QWERTY when using someone else's machine.
(I was also privileged when I switched to know that I didn't need to use shared machines. I was far enough along in grad school where I was allowed/encouraged to do everything on a personal laptop, and the few remaining "lab classes" with shared machines all allowed Remote Desktop. That took advantage of things like if you remote desktop back to one of your own machines, your remote machine still responds to your chosen layout once you've logged in. Just have to hunt and peck long enough to type your machine's address, username, and password.)
I switched when I was a teenager and have Thoughts (TM) about typing Dvorak, though I'm locked in at this point. The most painful experiences typing with it are:
1. Using a shared machine for something important. I've had to hand write and then hunt-and-peck essays on shared machines when I was still in college.
2. Typing something on a friend's computer when I'm inebriated. Not a huge problem nowadays with phones and being older, but in college trying to change the playlist when I was inebriated on a friend's QWERTY layout was... tough to put it mildly.
3. Piloting the Media PC with my partner. She types QWERTY and I don't. I keep Dvorak around as a second layout and switch if I need to do a lot of typing on the Media PC.
There's lots of both pros and cons of using Dvorak in my experience but at this point I'm so locked in that I'm not going to switch. But in my adult life, I never have to use a shared machine either so I'm always a few feet away from a Dvorak keyboard.
It's also interesting how #2 is shifting in recent years. These days it is more likely to be someone handing you their phone to change a Spotify playlist and while I touch type Colemak, I tend to swipe type QWERTY on phone keyboards, so it's not as tough now than when it was someone's laptop/desktop running the playlist.
Also, Apple Music's SharePlay is such an interesting modern approach too, where multiple people can control the same playlist from multiple devices.
Yeah, this is why I picked Dvorak: it seems there are better layouts but Dvorak picks up the greater part of available improvement, and it's more generally available.
I switched to Dvorak ±8 years ago, and I can still type qwerty almost as well as I could back then. I could imagine it being a problem if you're using other people's machines on a daily basis though.
