A. The financialisation of everything since the 80's basically ruined any progressive plans of upgrades or builds, if you are some retarded banker why lend them money when you can just buy pre-built ones(in many cases built by/for the taxpayer at their cost) cheap from Neo-Cons you've bribed and crank up the prices and run them into the ground till you are bailed out or given a bribe to upgrade them.
B. The High capital costs make them dead in the water most of the time, both from just construction costs, and the build up of environmental regulations post the pollution freakout in the 70's onward, so they cost more to build both in rep and and money then they are generally worth compared to other power sources, plus renewables have eaten their lunch while having a tangible benefit to a consumer, a new Nuke plant can't produce power cheaper than large scale renewables over the medium term, and people already go apeshit over price increases, tend to get more rooftop solar whenever there is a public increase or outcry over prices, and seeing your/a friend/relative's bill go down does way more PR than a Nuke plant changing the KWh price by a 5c at midnight ever would.
C. "Base Load" is just a meme and most people understand it even if they don't say it, most power is used during the day and evening, times Solar/Wind can easily cover with relatively small storage, Overnight power usage has always been cheaper for a reason, they can't turn the turbines off, so the big users have always been industrial, and why before renewables took off the 'advice' to save money was to switch to time of use and run high power appliances like electric hot water overnight if you could.
D. Only ever seems to be publicly pushed by the 'fUcK yEaH sCiEnCe' reddit crowd, clear fossil fuel thinktank shills(pro-tip if most of your argument is about renewals, you aren't pro-nuclear, you are anti-renewables), or Urbanists "YIMBY's" in City towers who hate people who choose not to live like rats in a warren, which generates some pretty negative PR for Nuclear regardless of actual feasibility and any rational use case.
In the end I just can't see a decent use case for it vs other options, if a plant ends up being oversized for need(as stuff gets more efficient), it's a white elephant that costs too much, if it's undersized it will need to be supplemented by renewables/storage anyways, so why not just put the money into renewables/storage and decentralise the grid a decade earlier than a plant will take to build.
