Yeah, to me it's a good thing needing less though....as long as I could still have plants. It would also keep my Dad off my back as I could argue it's slighly less weight!
I get the tank weight thing from my wife...wooden floors by any chance?
I have a few plants in my tanks, not too great with them to be honest but they're surviving fine...it's my fish that like to wreck them that's the problem...cichlids aye! On that basis I might be switching to silk plants soon anyway, when I get my severums added, they apparently love to demolish plants.
Personally I do think gravel is better for plants, it just feels more right, airy and porous, but sand should be fine...If you wanted there is no reason why you couldn't section off parts of the tank with rocks and use gravel in those places for most of the plants...obviously if you choice mosses and java ferns it doesn't matter though.