I still use rice cooker though these days, even more trivial to operate, can't mess up things if I miss the final part, and it will keep it warm for hours. Extremely practical. Its also baby trivial, at least the device we have (which is not pure rice cooker rather some multi stuff with rice as one of many options, but we basically just do rice and yogurt).
Also, paella may be a fine food (if eaten in Spain or affiliated countries), but that type of rice has nothing to do with usual type of rice used as side dish. I actually don't know how to cook that type of rice well.
My favourite recipe is to sauté chopped onions and peppers, a little garlic and black pepper, add shrimp, cuttlefish and clams, and then top up the water to the required amount and add the rice when it boils. Six minutes with the vitro on and, in ten more, it is delicious.
Change the seafood for mushrooms, chicken or whatever you like.
The rice cookers I've seen take twice as long to make rice that is by no means twice as good.
To each, their own. My Mom loves the rice cooker I gave back to her because it took too long to cook rice. =)