Vim Extension won't work if marketplace is down

Describe the bug

Yesterday the website https://open-vsx.org/ was down. This made the plugin throw an exception and not work. This is frustrating because as a user of a vim plugin I just want to get my work done and not have multiple points of failures that are beyond my control.

After plugin is installed should work even without internet access or market place going down.

Console logs:

[2022-09-29 20:42:57.933] [exthost] [info] ExtensionService#_doActivateExtension vscodevim.vim, startup: false, activationEvent: '*'
[2022-09-29 20:42:58.040] [exthost] [error] Activating extension vscodevim.vim failed due to an error:
[2022-09-29 20:42:58.063] [exthost] [error] Error: Service Unavailable
	at S._loadCommonJSModule (../../../vs/workbench/api/worker/extensionHostWorker.js:76:64278)
	at async Promise.all (index 0)
	at async f._activate (../../../vs/workbench/api/worker/extensionHostWorker.js:68:8225)
	at async f._waitForDepsThenActivate (../../../vs/workbench/api/worker/extensionHostWorker.js:68:8167)
	at async f._initialize (../../../vs/workbench/api/worker/extensionHostWorker.js:68:7531)

No source file or test is named. Start by reproducing extension activation while https://open-vsx.org/ is unavailable, then trace the activation path associated with the logged Service Unavailable error. Done means the installed Vim extension activates and remains usable without internet access or a working marketplace.