We have developed a template for a client with a crazy number of wysiwyg editors [to try and give them the "flexibility" they require]. I'm embarrassed to admit how many but its in double digits… however we believe we are pushing the bounds of what silverstripe can do and so should reduce the number of wysiwygs dramatically to try and stop getting the errors and speed issues that we are.

is there a general guide to how many wysiwygs a single template can handle?

we've split them up into different tabs, but there still seems to be way to many.

thank you…

Wow

That's a lot. Why would you need so many content fields? If somethings gonna suffer, it's JavaScript performance (try a browser with good JS performance, like Google Chrome to see if it changes anything). Shouldn't be an issue on the server-side though.

Still, I'd probably try to reduce the amount of WYSIWYG Editors... otherwise it's just a mess ;)
Can't you just create different Page-Types for the different use-cases? Or use Widgets or the DataObjectManager where you require flexible amounts of content-pieces.