This is a bit of a complicated issue, but if a FR is set up perfectly, when you bend a string, the springs will pull it back to keep it ALMOST in tune...and really close enough for the most part.mondola said:I remember Ej before saying that you can set up a Floyd so that the other strings stay in tune when you bend a string. I can't understand how, but I've no doubt that he is right. I haven't got that patience though !
If you want to bend the hell out of strings and have the others stay perfectly in tune while bending....the solution is simple. Block it from moving back...that way you can bend one any amount and the bridge will not move....hell you can even break a string or 2 and the others will stay in tune. With the FR blocked, you can even take all the strings off with no issues. From my experience a blocked FR will stay in tune better than a LP unless you have locking tuners.
Everything has it's pro's and con's...I suggest you get one of each if you can afford 2 guitars.:icon_thum