you can still use Konquerer or any old / niche browser if your site isn’t using the latest HTML/CSS features and Javascript APIs.
The issue is that webpages are incredibly complex - they can be full-scale applications - yet they are expected to run the exact same in different browsers, down to subtle implementation details. So in order to make a new browser you would basically be reinventing Chromium.
Or you could start fresh with a new language to write websites in complete with a new browser engine. I would actually love this, web design today is a huge mess with HTML / CSS / JS quirks and backwards compatibility. But you still have the literally trillions of existing websites, which you’ll have to support with Chromium or Gecko until the end of time. And more importantly, you have the 99.9% of users who are still using Chromium or Firefox and won’t be able to use your new website, so you’ll have to backwards-generate HTML/CSS/JS from your new script anyways.
Since Qt doesn't come with WebKit for some time now, I think Konqueror is for all intents and purposes orphaned. Its outdatedness breaks the Oauth2 flow for setting up Gmail calenders/contacts in Kontact.
The issue is that webpages are incredibly complex - they can be full-scale applications - yet they are expected to run the exact same in different browsers, down to subtle implementation details. So in order to make a new browser you would basically be reinventing Chromium.
Or you could start fresh with a new language to write websites in complete with a new browser engine. I would actually love this, web design today is a huge mess with HTML / CSS / JS quirks and backwards compatibility. But you still have the literally trillions of existing websites, which you’ll have to support with Chromium or Gecko until the end of time. And more importantly, you have the 99.9% of users who are still using Chromium or Firefox and won’t be able to use your new website, so you’ll have to backwards-generate HTML/CSS/JS from your new script anyways.