I guess i will add my two cents aswell:

Depends on the gun, velocity, and pressures for me. I too make my own gas checks for all my calibers even plain based gas checks for 9mm bullets. If i will be shooting over 1200fps or/and over 25k psi i will give it a check. Plain based gas checks solved my random leading issues in 9mm Luger (even PC would randomly lead in 9MM). 9MM Luger is a high a pressure round. Conversely never had a problem with a 38 ACP those are shot PB, but the plane based checks give me a little more confidence. My wife has a redbull habbit so i am not running out of cans anytime soon (i don't drink lol).

In some of my riffle loads that are low pressure and low velocity like some light 30-30 or 260 Rem then i will not run a check and it works just fine. If it has a gas check shank i normally check it. It cost me less than a penny for a check so it its not like i am loosing money. My gas checks makers were custom made for my bullets so they slip on flush with no effort. Not like those Hornady gas checks that i had to beat on with a rubber mallot till i bought a gas check seater. So time and effort to gas check is nill because they still get run through the lubersizer.