How many years on average?
How much outlay on average?
How quickly will you get your money back on double glazing on average?
Quoting vague best case scenarios is little better than selling snake oil.
Solar panels are snake oil? Better not tell our government where over half our electrical generation is renewable.
Solar panels take 3-6 years for pay back.
https://solarbright.com.au/calculate-your-solar-panel-payback-period-with-these-simple-steps/
Double glazing is more expensive but payback can still be 10 plus there is the immediate noise reduction.
https://www.deakin.edu.au/?a=724822
What is your problem with cheap, effective and economical measures like these?