In isolation, it’s very obviously a bad thing, because it makes solar less profitable and might slow down the switch to renewables.
In a wider context, it can still be seen as a god thing as it means there has been a significant pivot to solar already and luckily it’s also a very solvable problem. There just needs to be more energy storage.
I guess that depends. If the costs to invest in storage is cheaper long term than losing money from excess energy, then energy companies would lose less money and thus could offer cheaper prices. But it would definitely help decrease or get rid of negative prices.
Germany Has Too Many Solar Panels, and It's Pushed Energy Prices Negative (markets.businessinsider.com)
Tesla’s Sales in Europe Fall to a 15-Month Low (finance.yahoo.com)