I feel hygiene may now be better because of Covid19/coronavirus prevention laws where food workers are now required to wear face masks, wash their hands or use handsanitizer, wear plastic gloves while cooking food, and wash their cooking utensils and stoves.
A lot of the time customers can see through side window where cooks in the truck who cook their food, so you can see if they are being hygienic or un-hygienic like scratching their head or nose while preparing your food.
I feel regular restaurants maybe un-hygienic because the workers are cooking food in a kitchen where only staff like cooks and waiters can enter and see the kitchen.