Pros and cons of "purge into prime tower"

I installed Orca Slicer based on recommendations here. While checking Printer settings i realized there is one additional settings tab “multimaterial” which BS does not have. There is no OS wiki entry for these yet.

One of the settings i am interested in is "“purge into prime tower”. I think this can be possible in BS by manually selecting prime tower as “purge into this object” but can not be set as default.

The reason i am interested in is the volume of the poops which i have to get rid of. Prime towers are more compact that i will need less trips to common recycle bins which are four blocks away.

The cons i can guess may be;
Needs bigger prime tower>less build plate estate for printing.
Taller>more risk to topple>needs brim to avoid
More wasted filament if the dimensions are not set correct.

What is your experience?

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does orca slicer let you check the “purge in prime tower” box? mine will not let me check that box and i dont know why or how to fix it so if you have any advice or know how to fix this issue i would greatly appreciate the help or incite thanks so much:)