We've had a single and double BOB for years (5 and 2.5 respectively) and never once had a single problem with the wheel being loose or falling off. We do check all the wheels before every use, which is recommended no matter which stroller you are going to use.
If you do have an affected BOB you can obtain a part that can be installed to prevent the problem from happening. If you have an impacted model, even if you’ve never had a problem, it’s certainly worth fixing just in case. You can figure out your model year from this: https://bobparts.com/model-year-reference/
Re: PSA: Warning about Bob Strollers
And here’s the somewhat questionable information campaign link: https://bobinfocampaign.britax.com/#
Of course I bought a used BOB Revolution Flex last week that is impacted.