100,000 dollars invested in renewable makes more energy than 100,000 invested in traditional energy. so yes, it is economical at this point. germany is, pun intended, nuking their power grid to hasten their transition to full renewable. munich is on track to be 100% renewable in 10 years. china is making a huge effort at renewable.
nuclear plants are expensive not only to build but to maintain. they take almost 50 years to make a return on investment and by that time they almost have to be decommissioned. they're large, they're dirty, and even the "clean" ones that recycle fuel? if you shut them down those sites can't be used for an epoch.