Yes, there is no way we would only get fundamental changes like that in Australia. They will be worldwide.
Re how the diesel goes in hot climates - no issues from me. Done lots of runs including towing 1400kg boat behind mine in summer here with no issues. Temps up to 38-40 C.
Mr brother is about to do a 3 week road trip up to north Queensland (hot), then going inland west (hotter) thru central Queensland, down south thru southwest of the state into western NSW.
It will be winter here by then, of couse, no-one who is sane would do such a trip in summer. Night time will be cold out west, down to maybe 4-5 deg C or lower, possibly some frost, but daytime will push up towards 30. I will let you know if any issues but not expecting any.