Comment by hollerith
Your overall point might be correct, but some of your specifics are incorrect:
>Just look at any popular app on a tablet - they all have massive borders/sidebars and within those it's just the phone app as-is.
None of the apps I am using on my iPad have borders/sidebars.
Gmail and Youtube have long had dedicated iPad apps. DeepSeek has one (a well designed and implemented one) for interacting with its chat service. The last time I checked, Google Gemini had only an iPhone app, but I checked again today and found a full-fledged iPad app.
Even my credit union, which operates only in California and does not have any physical branches in Southern California, has a full-fledged iPad app.