While unlikely to be a tangible issue for most players, there are definitely use-cases that could see a PS4 or PS5 disconnected from the internet for extended periods of time. According to a statement Does it play? gave to Kotaku, the license-checks may have been introduced to combat refund scams, but were designed to convert into unlimited licenses afterward.
That appears to be the case, with an SIE spokesperson telling G___t the following:
"Players can continue to access and play their purchased games as usual. A one-time online check is required to confirm the game's license, after which no further check-ins are required."