Thank you all for supporting this feature request.
Moving the feature request to the product backlog.
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It is April 2019 when I post this with InDesign 2020 in prerelease currently and GPU Acceleration in Windows is still not a feature in the latest prerelease version of InDesign for Windows! @Adobe - how hard is this to implement? Maybe in 2022?
Sorry Barry seeing you face so many issues with InDesign. We are working towards making InDesign a more stable application and also fixing behavioural issues.
What would really help if you can submit any bugs/issues that you are facing along with the steps, this would help the team reproduce the issues internally. Please follow the below link to file Bugs for InDesign.