For me, it's because I use Windows at work, macOS and Linux at home and Android on my smartphone. AFAIK, Safari runs on only one of those 4 platforms. I am a Fi

For me, it's because I use Windows at work, macOS and Linux at home and Android on my smartphone. AFAIK, Safari runs on only one of those 4 platforms. I am a Firefox holdout and it runs on all 4. Also, IMO Safari until recently was very buggy and lagging extremely behind other browsers in features. Not sure if Apple ever got their act together on that.