Just had to check that as I was sure there was at least one season in the third tier. But no, you're right. It's a pretty good achievement.
(Past results are no guarantee of future performance. Terms and conditions apply.)
Like all true Brighton fans of course I want to see Palace relegated, set new records for crapness, sack another manager for sheer comedy value etc etc.
But actually if they did go down it would kind of put them out of their misery, wouldn't it? They'd probably be relieved to find themselves in...