There's a lot of 'anti-greenie' tosh being written in here. Knocking down straw men to bolster untenable arguments is as old as debate, so I shouldn't be surprised.
Yes, renewables like wind and solar are intermittent. There are two obvious fixes for this - grid scale stoarge (including producing fuel hydrogen, cryogenic and thermal storage as well as batteries) and diversification into other non-fossil, non-nuclear types of genertion such as tidal flow (needs good sites and sound ecological planning but predicatable and reliable, marine current (hard engineering but energy dense and very reliable and predicatable), geothermal, wave power, salinity gradients and so on. None of these is a magic bullet and some may never be practical at meaningful scale but there are a lot of options and some proven to be both achievable and of very great potential output.
Two other avenues are bigger, longer interconnects to link places with different weather patterns (vulnerable to issues of politics and sabotage) and it's opposite, decentralised generation and storage. The latter ties in with the expected vast increase in electric vehicles, which IF the V2H and V2G infrastructure is in place will provide a lot of grid demand smoothing and storage.
Fusion has a lot of potential problems, some of them noted already like waste generation and the tritium issue. These may be overcome with diligence, intelligence and lots of money but to start crowing now about the demise of renewables is both unscientific and an act of wishful thinking on the part of insecure nuke Believers.