In Ember, we have a long history of nudging people to do the right thing with deprecations and common linting rules that get updated over time. Anyone with a modestly sized app that needs to be kept up to date knows the difficulties of having to change hundreds of files that have multiple linting errors all at once. With a little bit of process and some handy tools in your CI pipeline, this pain can be greatly reduced and you can happily lint your large apps all the way to modern Ember at your own pace.