Bethesda's Todd Howard has confirmed that the developer is using its same old creaky engine to power Starfield and The Elder Scrolls VI.
The issue here is that the engine has never been very good, at least on a technical level. Last-gen titles such as Fallout 3 and the original version of Skyrim ran badly on the PlayStation 3, and Bethesda's now infamous for its buggy, glitch-ridden games. There was some hope that the studio would finally ditch its engine for its supposedly next-gen titles, but again, according to Howard, that ain't happening.
Source: http://www.pushsquare.com/news/2018...ame_engine_for_the_elder_scrolls_vi_starfield