The spell checker is probably the single greatest feature in Rider. It works really well on composite type names. E.g. 'CustomerPreferences' would not get a squiggle under it for spelling, but 'CusomerPreferences' would. Performance is arguably better in most circumstances, but it doesn't support some of the bleeding edge .NET Core functionality as well as VS2019 does.
It also doesn't support some dried up crusty .NET functionality like webforms either (it compiles it fine, but doesn't have the code generation tools that VS has )
