Is astronomy weather is getting worse

From the article: https://scopetrader.com/astronomy-weather-is-getting-worse-for-astrophotographers/

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Wildfire smoke is the biggest game-changer.  As the boreal forests continue to burn each year, 4-6 months of astronomy are lost to the high-altitude smoke plumes here in the northeast USA.   

Before the dramatic increase in the world's forests burning, we were also dealing with a large increase in cirrus clouds and decrease in stable, multi-day high pressure systems.   I would say the number of clear nights without haze or smoke is down 70-80% since the 1970's here.