I have it. It did take overnight to load/install (or some portion of), but it seems OK. I don't do anything weird on my MacBook Air, which is about 5 years old, maybe 4, so perhaps I am not the best judge. I have about 2,000 emails in my trash folder, but no media stuff, except about 100 photos. I don't watch videos or TV shows on line, either, or listen to music. So, basically, my computer is for what I consider to be computer stuff: email, web sites, Outlook, and I do receive texts on my computer if I get one while I am on it.
2015 Trek Silque SSL
Specialized Oura
2011 Guru Praemio
Specialized Oura
2017 Specialized Ariel Sport