The Business Lounge at Bangkok was excellent._ But there is not a buggy system in the airport.
Sorry, but
yes there is, having been picked up by buggy when arriving in BKK from SIN in September & as tactfully as possible declining the buggy service on the way back.
It's not something that is widely advertised, but if you want it, it normally has to be specifically booked & paid as part of your ticket & is organised by the local carrier's reps. It's not part of the landside "assisted boarding" services as for most airports, but part of the "special services" normally for VIP's etc.
I don't normally rate anyhting like this kind of service, but I was introducing one of our senior global personnel to the folk we were visiting & they were out to impress.