Nope! But it is inspiring them to push the innovation and maybe in the near future VISA/Mastercard will implement blockchain
You cannot estimate what revolution that technology and science will be having in near future. Blockchain technology may go to any level in near future so that it can surpass visa/mastercards' capacity someday. Just a decade before, I never got chances to think about the payment system which will be having all me needed freedom because I was struggling with paypal and alterpay (now payza) kind of dictators, but technology brought me something new to ensure my peace of mind. Anything may happen in technology developments hence we should expect more things and days to be waiting for us.
The potential is there for Blockchain to scale to many users.
This is the answer for this entire topic. Blockchain will have that capacity on its own or by incorporating some third-party services like lightning network. Moreover one famous quote reads like this
"bitcoin transactions are instant but confirmations may take some time".
Like, when there will be an enhancement to be implemented into bitcoin network (for example), we may start trusting bitcoin payments with zero confirmation also. Similar to that, we may have some new enhancement so that we will be having big blocks to accommodate more number of transactions along with backward compatibility, who knows ?