True - arguably the most important thing we do with our firearms!
I guess my point is that I don't think pistol suppressors are really worth overthinking - they function and perform pretty similarly. Unless you have a very specific use in mind where you want a light and/or short suppressor (the TBAC Fly 9's look awesome), I'm just not sure how much different most pistol suppressors are. However, maybe this is my complete ignorance, I'm not a huge pistol guy.
In my mind I think there's more nuances that are worth considering when it comes to rifle suppressors. But again this could just be my own ignorance.
For a pistol can back pressure matters a whole lot. Getting peppered in the face every time you pull the trigger sucks.
Also weight and other design features of the suppressor AND the host can mean either a very reliable host, or a not at all reliable host. Jamming the pistol every other round is not a good time.
In other words it's extremely important before going on a year long wait--only to be disappointed/or extremely happy-- to ask the right questions before you buy. The problem is, most newbies (to suppressors) don't know what those questions are. Believe it or not, forums like this and others provide a ton of valuable information. In ways the newbies are putting their trust in all of us, at least for a while.
As far as 'practical' use, it just depends on the end user. For example for critter control they can be the perfect tool.