For the most part, luxury travel doesn't appeal to me either. However, if I had the money it might be nice to try a splurge once-in-awhile, just for a change and to see what it's like. I've only been able to fly Business Class once in my life, and that was only because the bill was paid by a medical insurance company. I'd like to try that or First Class again, when I can properly enjoy the experience.
In some places in the world (and Canada is one example), rail travel is not used too much anymore, except for the commuter trains. Most trains these days are intended for sightseeing by rich tourists, and some good examples are The Canadian (Vancouver-Toronto) or the Rocky Mountaieer (Vancouver Banff/Jasper).
When travel becomes easier again and if I can find the money, I'd like to try one of the trains. The Ghan really appeals to me as it's a short trip and not too expensive. The "luxury" aspect is not the most important reason for the trip, but rather that it covers some diverse and spectacular scenery in a place I've never been before