HTP effects

Hi,
i know this has been covered before but can someone enlighten me as to why it easier "not" to be able to run intensity effects as HTP?
Why would you not want to run intensity effects as HTP?

I know what some of the workarounds are so i don't need to know how but more the why...
Is there any chance of this becoming a feature in the future at some point?

Regards C
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