Winds and solar are pretty well perfected, and aren't very cost effective except in specialized cases. Even if solar cells were free, the mounting structures and frames would still leave them more expensive than conventional sources. Proofing them against hurricanes, tornadoes, floods, and earthquakes isn't even on the drawing boards because the costs would skyrocket.
LFTR looks like the best low-cost, low-emissions option and is far, far safer than conventional nuclear where safety has to be grafted on at great expense. LFTR's continuously outgas their short half-life daughter products which makes seperation trivially simple while keeping the core clean of products that would produce dangerous fallout, unlike conventional nuclear reactor cores that have years worth of accumulated daughter products that get released during a meltdown.
It's a technology the commercial sector should've used since the 1950's, but as LFTR advocates point out, it wasn't useful for making bombs, and the US and the Russians wanted bombs above all else. Civilian energy production was just a way to slap a happy face on a weapons program.