Remove, restrict, irrevocably alter, or up the price to your service which users have come to depend on now that free alternatives cannot compete.
For example:
Pylance becomes a premium plugin, or VsCode is no longer downloadable and can only be run in the browser if you have a GitHub account, or VsCode only runs on Windows 11 machines, or VsCode requires an Office 365 account, or they fork VsCode and start adding heavy "telemetry" while simultaneously rapidly altering pylance and plugin APIs so free plugins and original VsCode can't keep up.
For example: Pylance becomes a premium plugin, or VsCode is no longer downloadable and can only be run in the browser if you have a GitHub account, or VsCode only runs on Windows 11 machines, or VsCode requires an Office 365 account, or they fork VsCode and start adding heavy "telemetry" while simultaneously rapidly altering pylance and plugin APIs so free plugins and original VsCode can't keep up.