No way 100% with Avantis, that would be too much risk for me and I don’t think anyone here has 100% of his or her ETFs with Avantis, anyone? I like also to diversify among ETF providers.
25% of my ETF portfolio is with Avantis with the following ETfs: 5% AVUV, 8% AVDV and 12% AVEM. Note that VT for me is only 50% of my portfolio.
There is nothing wrong in having 100% in VT especially if you are new to this world and such tilts like mine (if I may still call it a tilt in my case) is more about where you believe the market is heading to. For instance value has under performed growth during last 10 years and now you believe this is to change based on your research and available data.
ETFs from Avantis definitely have more risk as they are small in terms of AUM compared to Vanguard/iShares/etc, then they have much less trading volume and higher spreads and there must be some other risks for sure compared to VT.