10.3 to 11.0 migration

You can install the 1.x version on 10.3 and it should 'just work' because of how extension discovery works in Drupal - modules/contrib will take precedence over core/modules.

And then when D11 comes out you shouldn't have to do anything.

Ok will give that a go and report back.

composer require 'drupal/forum:^1.0' worked without issue and I can see this module version (1.0.2) listed as installed.

I didn't run a 'drush updb' after the install. Would this be neccessary?

Should be in the habit of running it, I don't think there are any updates, but good habit to get into

Thanks, "drush updb" ran without incident.
Appreciate you guidance and assurance that including the module along side the core version has no negative impact.