Hi Hans,
the Platform limits for Tables can be found
here. Unfortunately, 148k of rows is really way beyond the limit.
May I know what’s the purpose of such huge Insight, please?
The option to export to Raw CSV mentioned in the Community post is related to the Reports in our historical UI - PixelPerfect. Such option is not available for the Responsive UI and for the Insights right now.
I am sorry that I couldn’t provide you a better answer this time. May I at least pass your request to our Product management team, so they can reconsider adding this option on our roadmap, please?