Unless their core business changes and adapts over time...DuPont started making dynamite...
I'm not too familiar with Dupont's INITIAL "business model" or focus. But yes....MANY companies change their business model.
Those with FORESIGHT.....like Amazon and Tesla just to name two......knew from the beginning that their focus was NOT a single product.
In Amazon's case....they knew they could broaden out drastically from just books. From Tesla's standpoint....they knew they had a "starting point" which was the HIGH END OF THE CAR MARKET with their Roadster....but I think they always viewed themselves as an "electric company" of sorts (powering cars....powering businesses and homes.....and storage of electricity).
The French oil company Total has ALSO viewed itself more broadly as an
ENERGY COMPANY...not a narrower focus such as "oil and gas" (as Exxon has). That is why they bought the company Sunpower (US solar company).
There will be many oil and gas companies that will NOT be able to make the "business model change".....either because of the lack of monetary wherewithal....or because of stubbornness or shortsightedness.
History is littered with companies like Polaroid and Sears that were NOT able to pivot when either technology or consumers taste changed.