Users are not knowledgable enough to know what technology was used to build a product, but many have repeatedly complained about non-native UIs. Heck, Lotus No

Users are not knowledgable enough to know what technology was used to build a product, but many have repeatedly complained about non-native UIs. Heck, Lotus Notes went from being a market leader to an also-ran and user complaints about UX to corporate IT departments definitely played a role in convincing those departments in switching away. More recently, this also happened with many mobile apps made with cross platform/HTML5 toolkits. They got low review scores and low user engagement across many firms, prompting a switch to native.