Why there are ...
so few gas dryers in Europe?
1) Gas supply is not standard in homes. And if it is, it's only in the kitchen and in the garage/boiler room. My house has no gassuplly.
2) There are no domestic gasdryers available + most people are afraid due to explosionhazard (some of them are really freaky)
3) Never forget that it's only recently driers are getting popular. Smaller homes and households, often haven't got a dryer, it's not usefull for them...
If you want a gasdryer today, you can buy a 'pro' model, with larger capacity... but is it worth it?