I am a long user with 62,000 names - all entered at the keyboard over 40 years (except for one 1,000 file imported about 20 years ago when I learned my lesson).
After seeing the problems that people talk about on this board, I wouldn't come within a ten foot pole of syncing my file.
I still export to a gedcom and upload to WorldConnect every few days. If you want a tree on ancestry.com, you can still upload your ftm file every few days / weeks by just hitting the Share button in the WebSearch page and deleting the old tree. You still have the choice of both options.
One advantage of World Connect is that the urls for people don't change after each upload like they do with the Share button of FTM>Ancestry.
Also, you can make your tree public without letting people just steal your work by merging stuff.
Also, I like the various reports at WorldConnect better than ancestry - peidgree, ahnentafel, descendant outline, descendant register, etc.