I know that. I'm saying that if it was 6-6 all and you didn't want to have a 4 1/2 hour match, that you couldn't because at minimum you would have to play 7 more games. Right now it's possible to have a little bit shorter match and win 8-6
I don't understand this point at all. I wasn't
saying a 6-6 set couldn't end 8-6. Why Would there ever need
to be seven more games at 6-6 under any scoring system?
In fact, the final scores (and number of games played) are identical under the schemes once you reach five all. Once you're at five all, whether you use alternating serves or tie-break serving, you need difference of two, so in fact you couldn't even tell by looking at the final score which method was used.