Grundy
It's been tried (sort of) by racing drivers of the Cooper F1 team, hence the Mini Cooper in the 60's ;-) Fortunately the 75 has damn good brakes too!
We operate ours at c15 tonnes below MTOW and by all accounts a no de-rated take-off is a kick up the ar$e to be believed, that is 'till ATC and Mr Boeing spoil it with SIDs and exceedance speeds............
The 75 is like a jet 'Twotter' or Mini Cooper, ask her nicely, and she'll do the impossible. AND.......... come back for more.
I refer to all 22 as 'My girls', purely out of respect.
Well done Mr Boeing and RR.