Nuclear waste is a problem for the most like any other. Given enough investment it can be solved, and no I’m not talking about finding better ways to store it. China has made major advances in this regard, their newest reactors generate waste that is much less long-lived (hundreds rather than tens of thousands of years), and they can reduce the volume of that waste through recycling.
I’m not saying nuclear waste is not a hard problem to solve, it is and we must be careful as a society to make sure it is managed well. In the meantime, we have a climate catastrophe which is much more pressing. Coal plants, which provide base-load electricity, are a prime target for conversion to nuclear, because their steam turbines can be reused. This could decarbonize a large part of the electricity mix of many countries.
Yes, because:
a small apartment is more comfortable when you have other spaces where you can exist for free
in our increasingly isolated society we need more spaces for serendipitous socializing
It does tie into affordability though, because the lack of third spaces is in itself an indication of an over-exploited real-estate market. A third space is almost by definition not maximally exploited, because you’re allowing non-paying patrons to take space which could be used by paying ones. Allowing non-paying patrons is only a moral question up to some point, after that it’s just the market forcing the choice between more exploitation or bankruptcy.