The Kinto Factory is a Toyota initiative in Japan that brings current updates to older vehicles, and the latest model to be added to the service is the 2017-2019 Lexus LS 500 & LS 500h.
Priced at either ¥132,000($969 USD) or ¥159,500($1,170 USD) depending on the powertrain, older LS owners can upgrade their transmission throttle mapping to match the latest model refresh. This is welcome news, as the LS did suffer from some non-linear acceleration issues in its first years of production.
The downside, of course, is that this service is only available in Japan.