There’s no reason to believe if tax advantages are gone, savings habits will be gone: Feroze Azeez
"The only one point which needs to be considered is largely making it simple. If you are getting say Rs 5 lakh deductions under the 80D, 80C, home loan, HRA, then you are better off in the old regime. This is the only decision point which is simple enough for a lay person to comprehend. The sum total of all exemptions should exceed Rs 3.77 lakh for him to write to his employer and say keep me in the old one, otherwise the default is okay."