Might not be 20 years, but it's clear SCR is in no hurry to go for LHB rakes.
In fact it has replaced many 2005-06 made CBC coaches in SCR kings after the 2017 lot has come in.
Forget about 12727, still no sign of ancient Rajadhani ICF rakes of 22203/4 & 12775/6 getting LHB replacements!