i think the older aeropresses (with gold labels) have some iffy chemicals in them for the sake of the plastic not cracking. my V60 is fine after a few years but i don't use it as much as i want to.

i do kinda regret not getting a ceramic V60 though.

For reference, this type of cracking is called crazing.

I use a borosilicate carafe with a black plastic basket and that has lasted me ~5 years of daily use. Clear plastics tend to crack due to thermal shock as they tend to be more brittle, so this isn't surprising to me. I also have a Hario drip that is glass and I like that one a lot for immersion brewing that I would recommend. The silicone can be a bit too floppy at times though.

I have 2 sizes of these, both this same material. They are both fine and look nothing like yours

Mine did exactly the same thing.

I don't have a V60, but my bonavita drip machine has a clear plastic window that has tiny cracks like that, but only exactly where the hot steam escapes between the dripper and the shower head, so I suspect we both have heat fractures from thermal shock. For me at least, it still is watertight so I'm not worried about it too much. Yours looks like it might be soon losing structural integrity.

I would stop preheating with boiling water straight from cold, can you first heat it with hot tap water for 30 seconds or so? Might reduce the thermal shocks if it's already at 120 instead of room temp

I believe Hario changed the plastic on these a few year back but even the current plastic, Acrylonitrile-styrene resin, is not super high heat resistant.

This is your brewer telling you it's time to upgrade to a suiren. Agree this should have lasted longer though.