Nuclear has its advantages, but there is hardly anything as cheap and maintenance free as solar+batteries. Anyone can set it up, and it just runs all by itself for years and years.
In Europe, the price for electricity on the spot market regularly goes in the negative. Jep, you can get paid money to consume electricity because it's so abundant.
Look at France, their new NPP is taking 12 years and 12 billion euros more than planned. Is it really worth all that financial and environmental risk building something poisonous and explodey that needs constant attention?
Microsoft jumped fully on the AI hype bandwagon with their partnership in OpenAI and their strategy of forcing GenAI down our throats. Instead of realizing that GenAI is not much more than a novel parlor trick that can't really solve problems, they are now fully committing.
Microsoft invested $1 billion in OpenAI, and reactivating 3 Mile Island is estimated at $1.6 billion. And any return on these investments are not guaranteed. Generally, GenAI is failing to live up to its promises and there is hardly any GenAI use case that actually makes money.
This actually has the potential of greatly damaging Microsoft, so I wouldn't say all their decisions are financially rational and sound.