Best no-AF catch-all card? BBP vs Freedom Unlimited + BBP personal use question!

Hello — I’m looking to add a catch-all card to my lineup.

Right now I have:

• Amex Gold

• Chase Sapphire Preferred

• Marriott Bonvoy Boundless

I’m looking for a no annual fee catch-all card, preferably Amex or Chase, but I’m open to other options too. Right now I’m leaning toward either:

• Amex Blue Business Plus (BBP)

• Chase Freedom Unlimited (CFU)

My main question is about the Amex Blue Business Plus.

I know it’s technically a business card. I’ve read that Amex isn’t super strict about personal spend, but I want to hear from people who actually have the card.

I do Uber on the side, so that’s what I’d put on the application, but realistically I’d probably use the card for groceries and everyday purchases.

For BBP holders:

• Do you mix personal + business spend?

• Have you ever had issues doing that?

• If you had to choose today, would you still pick BBP over CFU as a catch-all?

Appreciate any data points or experiences.