I've (age 44) followed the advice here and have a mix of VTI (63%), VXUS (27%), and BND (10%). My plan is to slowly start transitioning into more bonds as I age.
I've seen this Glide Path posted a few times in the last week (https://workplace.vanguard.com/investment/strategies/tdf-glide-path.html). It recommends international bonds. I haven't seen anyone specifically mention international bonds. Are you diversifying with those? If so, what ETF? Pros and cons of that approach?