I design on a MacBook Air. I know--shocking. I travel and work around the world and love the portability. I work with Sketch way more than anything else. I've actually done a tiny bit of screencasting too--the main issue there is just exporting videos takes forever. With Sketch, I'm more likely to divide big projects into separate files to control file size and reduce lagginess in the program. Sometimes the fan is loud but it generally works fine for me. Also, given Sketch's bugginess I tend to attribute more of the fairly rare performance issues to the app architecture rather than my hardware. YMMV.
I design on a MacBook Air. I know--shocking. I travel and work around the world and love the portability. I work with Sketch way more than anything else. I've actually done a tiny bit of screencasting too--the main issue there is just exporting videos takes forever. With Sketch, I'm more likely to divide big projects into separate files to control file size and reduce lagginess in the program. Sometimes the fan is loud but it generally works fine for me. Also, given Sketch's bugginess I tend to attribute more of the fairly rare performance issues to the app architecture rather than my hardware. YMMV.