Nothing like a good ol' 3-year-break to get over the frustration with inescapable areas, huh? Better luck this time! :3
Most of the super-secret areas were added after I'd already ran out of lore to place (I decided to limit myself to 50 for a reason... which I've now forgotten) so most of them only house the gun upgrades (and powerups/money), the majority of all lore is on the critical path or in "regular-secret" areas. But combing the game for all the secrets hopefully feels worth it regardless~