The Bonvoy Bold bonus received in May 2021 makes you ineligible to open Bold and Boundless until June 2023. (Maybe sometime in May, I don't know the date the previous bonus posted.) I do not see any other problems based on current Boundless or Bold terms. I read the offer terms, I did not use the chart.
I think I will definitely do the Boundless in June. Unless of course there is a huge SUB on Bold.