It’s also not very hard to modify non-silenced keyboards with aftermarket rings. I did that on my old HHKB and it worked great.

Meh, while it actuates the noise a bit it generally doesn't make a night and day difference.

For me coding during night was a no with my older MK even with the rings I would wake people in my house when typing.

That’s reasonable. Modern silent MX switches and MX clones like the Boba U4 are extremely quiet because of their internal dampening.