Have you ever rented or borrowed an amazing lens? I borrowed the Sony FE 70-200 f/2.8 GM lens from a (good) friend today. I'm speechless. I want to say, "There's no going back" but there's really no way forward. I just have to enjoy it while I have it.
I already own the F/4, and the differences, I'm sorry to say, go way beyond the f stop. The zoom and focus rings on the GM are amazing in their ease of use and responsiveness. The clarity and IQ are leaps and bounds ahead of the lowly G lens.
I also rented the FE 24-70 F/2.8 GM and I'll have it through the weekend. All of this amazing glass is here to help me shoot my first and maybe last wedding. My mom is getting married on Thursday, and I am going to be the photographer. So wish me well.