The weather for much of the US has been extreme the past few years. So obviously this has created an enormous challenge for superintendents and greens keepers, especially in the warmer climates.
The necessity for chemicals and fertilizers to treat diseased grass and promote growth has increased considerably, and so has the cost of those necessities. I think people would be shocked to know just how much overhead there is in maintaining good greens, let alone the fairways, tee boxes and taller grasses.
Costs of maintenance aside, there used to be two months per calendar year (usually May and September) when I would make it a point to ask about conditions of the greens due to aeration. But even back in 2016-2017, which was when I last played regularly, I noticed more courses were having to do intermittent shallow-tine aeration to fend off the disease because of excessive heat and moisture. Some were under a constant state of maintenance during the hottest part of the season.
Most courses today don't have the amount of resources to keep up with the demands that the weather is forcing upon them.