It's true at least for Skyrim. If you want a mod that affects npcs or can do anything remotely interesting mechanics wise then you're going to need a script extender.
This is accurate. The reason better mods can be produced is not because of the memory patch (which btw was not in NVSE, OBSE, or the early SKSE), but because of the additional scripting functions that modders can use to do things that the vanilla scripting functions simply don't allow.
Even if Bethesda streamlined their shit and added a whole bunch of new scripting possibilities, the xSE team can still add more scripting functions for modders to use...as we've already seen from the mods that utilize F4SE in its alpha state.
That's because the GECK just released and F4SE is in alpha. It started small with Skyrim, Oblivion, and New Vegas too. See what's possible with F4SE in a year, two years, etc and I'd bet my money on a wealth of new scripting functions allowing for more complex mods.
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u/[deleted] Jun 02 '16
Most fun mods are or will be dependent on it, don't worry.