Turn on Biz Functions before S/4 Migration?

Hi all,

We're in ECC 6.0 EHP 8 Netweaver 7.50

We don't know when we'll migrate to S4, but we're trying to be pro-active.

There are plenty of business functions which we don't have active yet. Some of them will be handy and we'll activate them immediately - but there are others which we don't need. For example, there are plenty focused on the Web GUI, which we don't use often.

Is there a standard recommendation for what should happen with business functions before an S4 migration? If they have no negative effect on our business process, should we activate them? Are there any that we have to activate before an S4 migration? If there are - is there a list out there?

Thanks for the insights!