"The days of Leonardo da Vinci," scientist Etienne Wenger wrote in an interesting essay, "are over." According to Wenger's theory, "today's complex problem-solving" requires multiple perspectives, rather than centralized approaches. Our industry, of course, is no exception. The days of the we-are-a-PMS company-but-kinda-offer-a-booking engine-as-well-kind-of-vendors (not dissimilarly to Da Vinci's), are long gone; because, In order to be (really) scalable and innovative, technologies must be as agnostic and decentralized as possible. Hoteliers should feel free to choose (and/or replace) part (or all) of their tech stack as they please, rather than being bound by one single, monolithic, centralized, vendor that tries to do everything.
James Surowiecki, in his classic text, The Wisdom of Crowds, elegantly demonstrated how hyper-specialized knowledge is crucial for innovation, so instead of chasing this all-in-one chimera, we should let different providers focus on their respective niches: so -please- let PMSs be PMSs and IBEs be IBEs.
The bottom line is that the industry must focus on what's really important: creating a micro-service architecture, cloud-native, open API-driven landscape. If we get there, hoteliers will, finally, be in control, rather than being controlled by their vendors, and we'll eventually get out of the 20th century...