It's a nice ad for the service, but there are many services that can do a simple forwarding to mailboxes. The hard part about the GSuite Free shutdown isn't the email routing. It is docs that have been shared with you, calendar events that Google has a hard time realizing are now managed somewhere else, Google Photos and Keep that can't easily be transferred, Play Purchases that are stuck on the old account.

So it is nice to provide a simple guide, but this is the trivial part of the migration. It took me about 2h mostly because I was cautious and did a slow migration.