The same thing has happened to Clementines- too much sun, too high temps and not enough water, and they become too sweet and lose that 'wonderful tang'. They are trying to grow new species in Corsica, but it takes about 20 years.
Same is happening with grapes for wine all over the world. The Champagne region is getting too warm for Champagne productors. they bought lots of land in Southern England for this purpose but (yep- the truth- so here goes), Brexit has put an end to easy, frictionless exports to EU.