In reply to Herbert G. S..

It all depends on your definition of a "Page Builder".

If Gutenberg phase two restricts itself to Header / Footer / Sidebar constructs then it remains consistent with a componentised block manager / editor architecture.

I would agree that is the natural and historic definition of a "page builder".

But...

The term Page Builder used in the industry is more representative of the term "Integrated Design Studio". Most, if not all of today's "Page Builders", began as...well...page builders (much like Gutenberg of today). They have, however, grown into full blown integrated design studios or are on their way to being so.

Perhaps in the new 5.0 world existing Page Build vendors should rebrand to being WordPress Integrated Design Studios and recognise that the term "Page Builder" is now a core feature.

Just a thought... :-)