It has stronger effect on new rubber since the sponge is new.
My backhand ESN rubbers used to to go dead after 2 months or 3. Now they last only a month since I hit hrder and more with the backhand. And I reboost H3 every month. Boosting Chinese rubbers is still a bit of a hassle but not as much as people think if you play regularly. Since otherwise you’ll have to cut a new piece of rubber at around the same time.
i think the problem is people tend to overdo it way too carefully, such as putting a layer of glue before hand, 2 or 3 thin layers how many and spread them every 24hs etc. Perhaps you’ll find an optimal point but you’ll realise that it’s not much different, at least at club level playing.
(the rubber can only go that far, so there is a diminishing return)
if an unboosted rubber performance changes so drastically after 1 month, I wouldn’t expect myself to to boost a rubber to churn out more consistent performance. If you set the bar reasonable, it’ll be a little easier.