Zuzu ...
I've tried my best not to put my two cents in on this subject, but reports from one garden and one nursery can create a bias. Here's a few shots of own root roses that have put out plenty of basals and are vigorous plants. It always depends on the rose. Mother Nature has the last word.
Gourmet Popcorn in May of this year just starting it's first flush
Linda Campbell
Test Rose
Morey's Pink
Silver Cloud
Splish Splash
Woodshed bed with, going from left to right, Sweet Chariot, Kim Rupert, Velvet Fragrance ... 2nd spring ..., Grace Seward
Lynnie
I think blanket statements about own root vs budded are misleading to those who are new to growing roses.
I do have some budded roses and love them, but I don't think all own root roses are not vigorous garden roses.
Smiles,
Lyn