Welcome to the Technical Forum. The benfit of the vapo bearing is it eliminates wobbling.
Here is a brief overview from Sunon:
I have not heard of this happening with the Sunon fans. Though every electronic component can fail early. Sunon is a cost effective fan. Do I see this happening again? Most likely not likley to happen again. They do have a good product. Though if you would like to change to a Mechatronics fan, we have a similar product part number 1570-1242-ND. Here is the link: G6015E24B-RHR-EM Mechatronics Fan Group | Fans, Blowers, Thermal Management | DigiKey
This one does have ball bearings instead of the vapo bearing. Here is a great overview on the types of bearings : Fan Bearings & Longevity
You can see on the chart that the most common bearing used for fans is a ball bearing type. Hopefully this helps.
This might help you make a decision on if you do want to change.