Ionic for Webapp,pwa

Hi all,
Please help with your feedback.I am working with ionic for last 3 years,and quite fond of it.Now I have to build a full fledged website,with mobile web ,pwa and apps for android and ios consecutively,so I have opted for ionic 3.

It is going to be a Enterprise website,so how feasible it is to build a scalable web site with ionic3 and as I can see some css challenges already,and many components are mobile specific.So can I use Bootstrap4 with that or it will be better if I go with Angular4/5 for website with bootstrap4 and for mobile separate codebase with ionic3.

Please help as I have to decide fast.