it depends on the concept and how the story progress...even if too stick with drama...it has to be sensible...its all depends on the genre of the show and how its been progress...swap couples along with good drama in SR made everyone glued...thus will be watching it...married couples doesn't break easily in shows...especially RS(female)shows...will watch it...but everything there is a limit if in future it turns into SNS/SSK...i will definitely quit...currently the phase is good in SR as far as screenplay...story and concept is concern...its only the high-voltage drama is giving a headache...there should be balance of romance-drama and family bonding
if you ask abt other shows...like TSM...BD...DYM..Matured love stories and passionate love stories...self discovery of identity as a women...such shows are better to quit if saas-bahu shit tries to dominate the concept...such shows has different kind of audience...they don't like such regressive crap...