Well..not that in other parts of the world is better... I actually think that in UK track day are great and very well organized...even the weather here..su%&$#
Misano (depending from the organizer) let you ride at your risk and peril if wet.. as the track - unless is torrential rain and with paddles everywhere - is open. Mugello most of the time during track days, if start to rain well..is simple... they shut the track off!! So tough for who has booked a single 30 minutes session at 75 euro.....!!! no refunds.... or insurances.
Still, if it is wet, I leave my bike on the trailer..