Modern wonders never cease!
I recommend committing this to muscle memory. It takes two fingers, but is more comfortable than reaching for escape on most keyboards.
I prefer mapping caps lock to control rather than to escape, but that's another good alternative. But in any case it's nice to have another option for quitting vim in case something terrible has happened to your escape key, as it sometimes can (sigh) on modern laptops.
Whether it's good typing practice to use one hand for both the ctrl and the C, say, in a ctrl-c construct - I can't say.
I know that I rarely if ever use the right-hand control or alt keys (on a standard US-mode PC keyboard that has alt and control keys on both sides). I suspect this is poor form.
I figure it's easier for people to remember now.
Though I use a fancy keyboard with QMK firmware, which allows customising this without needing to change settings on the computer.
While the <Alt-[a-z]> mapping is great and enabled by default, it does have the side effect of logging an extra key press based on the [a-z].
I'm not suggesting you just use a USB keyboard instead (although, now that I say it, that does seem like a solution).
What I'm actually wondering is how much work it would be just to create a single button that's an escape key on a USB stick that implements the USB keyboard protocol (but only ever reports that the escape key was hit).
If you have a suitable Arduino (or compatible) lying around probably not a lot of work: https://www.arduino.cc/reference/en/language/functions/usb/k...
It would depend if "Escape" requires a specific non-standardized scan code or not. (Even if it did you could also try sending the Ctrl-[ variety instead.)
(It's even possible to get away with not using USB-specific hardware, like I did in the "old days": http://code.rancidbacon.com/ProjectLogArduinoUSB :D )
Random piece of keyboard trivia: On Mac OS X (and I assume current variants) each keyboard is a separate "entity" with e.g. separate state which includes caps lock state. This means that the USB "Capslocker" gag USB dongles that randomly toggled Caps Lock state didn't actually affect Macs.)