I have decided to move my project away from ionic, and i successfully finished it.
The main reason was the size, the too many bugs, which is not maintained for years and i was not able to introduce angular 5 on time. Later on i realized that i would like to move away from angular also, and going to react like direction.
Size: It started from 2.5MB + 460KB css (css now is around 5KB), and when i removed all ionic part from my code it did go 754KB with ionic included (485KB with angular cli). The last 40KB reduction was only an AlertController and Gesture stuff, which i already modified as it’s not used some functionality of Hammer.
I’m using some test data which is included in the bundle under data folder, so the real replacement of the ionic is 150KB at the moment, after cleanup it will go around 100KB very likely. It replaces angular event system also, and using generated forms also, which saves a lot on ngFactory classes size (as there is no template for them - i slashed hundred KB-s on that part). (can come from server as json, or just configured locally in json) The first idea was to share it, just the concept, but after all my whole app is 95% reusable, so it would be quite risky. To make a working project, you only need to define the data folder in json. (without any codings)
My next step to process cordova, i saw also an interesting, but finished project called Microsoft Ace.
When cordova was started, very likely android and ios were a little bit odd framework. At least what i saw that you can replace cordova with 5-10 lines of code.
I jumped also to some native browser component, instead of using ionic, because the majority of the browser already implemented that stuff. I was not focusing on toast and cards, footer / header, which are really just pain on the ass. (you can do it with divs, or css grid)
I have made a special container, which split up the tab component. The tab buttons in my case is independent line of buttons totally separated from the container.
Without Ionic: (after 4 month ui development)