Worth to use Ruthenium spark plug?

[Yeobh]

Looks like  more and more manufacturers of  spark plugs are changing from  hex drive ( 6 points ) to b-hex drive ( 12 points) . Currently the most commonly one use by European cars are 16mm Bi-Hex  and for small cc engine 14 Bi-Hex. The PSA car makers even comes with smaller size spark plugs and some need special long spark plug socket to to the replacement.

For Japanese and Asian cars , if you have info pl feel free to adv  me

PS have you ever come across cars using 18mm hex drive spark plug, I was told this can be the next popular size.

TIA