Wouldn't swap mine either, had various four strokes and just love how light / nimble it is, It came with an 11ltr oversized tank which allows me to fuel when everyone else does. One member tried it and said 'it's like a mountain bike with an engine'!
Yes you need to carry a 100 mil of oil for your pm stop but it's hardly any bother. Re maintenance, as previously said, gearbox oil n piston when due. If I were to fall off crossing a river I would rather be on a two stroke, than face a very expensive bill for an engine rebuild on a four!
My brother has recently bought the Beta 300 2 stroke, have only ridden it around the block, but what a cracking bit of kit, auto lube, low seat height and light! I now want one........
And you can adjust the power valve using just an allen key, no springs to change - Nice!