L2 is on its last legs, We're still waiting for the final merger yet, which will probably bring some fun for a few months and then the stagnation will take over again and that's about it.
The L2 servers will eventually be closed when the player base drops below 1000 or the money that player base brings has dropped below certain point. This has already happened here to L1, MxM and some other games. That's well within the expected parameters.
Not sure about the classic servers, but these are very wicked and may collapse sooner than expected or last for years to come.
In the end, the choice is yours.
Good luck!