I would like to upgrade my early 2015 mbp i5 with 16gb ram for a top spec MacBook. I have done the maths and for single core it is probably 22% faster and for quad core 9%. Not massive gains I know. It adoes not make financial sense to upgrade or technical sense in all honesty but I do like the weight etc of the MacBook. I am not a power user but from time to time I will want to edit some video and could have clips up to 30 min in length. Maybe in 4k. Does anyone with the MacBook 2017 have real world experience of if this will work and if so how easy would it be? I've seen the YouTube videos doing 8k etc but what is it like in the real world? I went into the apple shop and opened iMovie and played a 30 second clip full screen on an m3 model and every transition stuttered. It didn't make me confident. Any thoughts anyone?