Two main things have changed in aero engines lately: multigrade oils (which are not so viscous at low temps) and most "advanced" owners have the "Skytec"-type high speed starter motors which crank the engine 2x to 3x faster than the old style starters.
In the UK, largely due to airfield/hangarage politics, almost nobody has the facilities to preheat engines.
Yet there is no evidence that UK based engines are getting trashed at great rates. I send my oil analysis to a US lab and my metal numbers are in line with the US averages.
What I do see regularly is people unable to start their engines. This is probably a combination of using straight oil, knackered batteries, and knackered starter motors. But that is a separate issue to doing damage to the engine by starting it at say 0C without a preheat.