It doesn’t take long at all with the M series Mac’s. On windows I have no idea. Those are for playing video games and special programs that run on intel. Typically it takes 1200 photo Lightroom library about 3 seconds to load on my end. Maybe it’s not the drives. Maybe you need a M series mac. They are amazing for photography and video
If you do absolutely get the higher GPU count. You will enjoy it if your shooting 5k-8k or have a sensor larger than 60 megapixels