Not sure what you were trying to say about everyone suddenly needing to get a new set of chargers either.
They are talking about the original MagSafe (2006) and MagSafe 2 (2012). These versions of MagSafe had incompatible connectors and the cable couldn't be detached from the adapter like you can do with MagSafe 3. So, if you bought an additional MagSafe adapter, it was useless with a MagSafe 2 MacBook.
They are talking about the original MagSafe (2006) and MagSafe 2 (2012). These versions of MagSafe had incompatible connectors and the cable couldn't be detached from the adapter like you can do with MagSafe 3. So, if you bought an additional MagSafe adapter, it was useless with a MagSafe 2 MacBook.