The MacBook Air has been woefully insufficient for years now. How about trying the 13" MBP and forego the touchbar? Maybe try the 2017 MacBook? The MacBook is very much better than the air in every single conceivable way.
I have an 1.7 Ghz i7 processor, and 8 GB of ram. I mostly use a browser and an iterm in my workflow, this macbook air will be still enough for years.
And my biggest problem with that machine was the keyboard, which is not good for me.