It's true the way the NHS operates now is outdated and insufficient for modern needs. We have a much larger, older, and in many ways unhealthier population. The challenges it faced when it was founded have changed.
But that said, there is a crisis across multiple theatres causing the overall massive bombshell coming down the line; not just how the NHS operates.
We have a severe staff shortage, because HCPs are poorly paid and badly treated in the UK.
The government has been closing hospitals rather than building and opening more.
The cottage hospital is a rare sight nowadays. We need them and convalescent homes back in numbers to fill that crucial gap between hospital and independent living.
The investment in GP services has not kept up with population growth and planners often fail to account for healthcare (and education) when building hundreds and thousands of new homes.
Our care system is in an appalling state. We need vastly more care homes, staff to man them, and staff to help people in their homes.
NHS dentistry is also in an appalling state. We need serious money invested in dentistry.
So many healthcare issues could be prevented by investing heavily in care at ground level - your GP, your dentist, your care home staff.
So yes, the NHS model of free at the point of use may need an overhaul. But honestly it would not be the top of my list. The first thing I would do, if I ruled the world, is embark on a massive recruitment drive for nurses, care staff, and GPs, and build more care homes. Then I'd build / reopen hospitals and sort out dentistry.