Quasar Dev Build fails due to Webpack issue after upgrade of QMarkdown from v2.0.0 Beta 10 to v2.0.5

[mickey-bimlive]

I'm using QMarkdown with the following Quasar levels:

 Dev mode.................. spa
 Pkg quasar................ v2.18.1
 Pkg @quasar/app-webpack... v3.15.1
 Pkg webpack............... v5
 Debugging................. enabled

A couple of days ago I realized that QMarkdown is still on v2.0.0 Beta 10. So (maybe naively), I issued:
quasar upgrade -i

Initially that upgrade looked successful:

@quasar/extras: 1.16.9 → 1.16.17
@quasar/quasar-app-extension-qmarkdown: 2.0.0-beta.10 → 2.0.5

However, when I tried quasar dev after that upgrade, my dev build fails with the following error message:
App • ⚠️ Extension(@quasar/qmarkdown): is not compatible with @quasar/app-webpack v3.15.1. Required version: ^4.0.0

Reading https://quasar.dev/quasar-cli-webpack/upgrade-guide, upgrading a Quasar app to Webpack v4 looks like complicated work.

Is it true that I need to do that, only to be able to upgrade the QMarkdown app extension to the newest level?