Actually having a lot of success removing these in the shop right now. Quality drill bits (presto), a pedestal drill and a secure fork/frame jig. Drilling the threaded sided of the axle in 0.5mm steps up to 0.5mm less than axle thickness. Few days of plus gas soaking and an eze out does the trick. Have done 4 this month.
Only kicker at the minute is my favoured replacement thru axle is out of stock everywhere and I often have to replace with a SRAM maxle or brandx.