everyones got there own style. some like doing that some don't. In my opinion It works great for some strains and not so great for others.
try it out, then next grow try something else.
personally, when I grow indica I never top. I just love getting a huge cola.
I fell in love with lolly popping most strains I grow. SOG style. this in no way means I will yield more than someone that tops and veges a bit longer.
Sativas I sometimes top, bend play around with. even with Sativas I sometimes just do a SOG.
its just my style does not make it a good one.
vegging longer won't stress the plant. flush every so often to prevent salt buildup.