If light doesn’t experience time, how does it have a limited speed?
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The trick is that everything is moving at exactly c, but in spacetime.
We, entities with mass, are “timelike observers”. This means that, when we don’t do anything special, we’re moving at c-speed in the direction of time (in human language, this means that time passes and we’re not moving through space). We can try “tilting” our movement towards the direction of space and we can, to a certain amount, but we can’t arrive at 45°: that is what we commonly call “light speed” because a “lightlike observer” moves at c-speed in space and time together. This is what we mean by “don’t experience time”: if light moves in time while it moves the same amount in space, our definition of “experiencing time” fails.
It’s a complicated but fascinating subject, if you have more questions try asking on physics.stackexchange.com or drop me a DM!
(source: I’m a theoretical physicist)
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