You can use o-rings to reduce the key travel as well as noise.
O-rings help to "soften/smooth" bottoming noise.
But not to noise from springs kicking keys hard back to top position.
Keeeping that under control needs more controlled lifting of finger.
Here's some good stuff abotu damping those different noise sources:
https://www.reddit.com/r/Mechanical.../a_relatively_simple_method_of_silencing_any/
Cherry MX Silent apparently uses rather similar approach in both cushioning bottom impact and rise to upper position.
https://www.youtube.com/watch?v=R939TYKyZUE
After having previously done some testing in shop I eventually bought Logitech G710+ which comes with o-rings. (when there was good discount on it)
And definitely wouldn't call it as that quiet.
Actually Topre had clearly smoothest sound from switches I had tried.
Which shouldn't be surprise because mechanical design is combination of membrane (/rubber dome) and spring.
Romer-G might be somewhat toward Topre's sound profile.
wouldn't say it does everything better, gaming for example if you're holding down a key for an extended period (generally w) then the lighter key of a mech board is a boon.
Actually typical membrane keyboard doesn't have that heavy bottoming force.
Though no doubt there are (/have been) plenty of difference between manufacturers:
Some membrane keybords are incredibly "mushy" and there's no slightest feel except that of just like pressing some jelly/rubber...
With low profile and short travel some HP keyboards are just total torture to use.
While never felt Keytronics of 20 year ago or Logitech membrane keyboards being such mushy.
Mechanical switches again have always highest force at bottom and lowest force in start of travel:
MX Black has rather notable bottoming force.
Red is lot more comfortable in it, but again resistance before actuation is very light.
Brown kinda combines some feel before actuation to light bottoming force.