Do I stay with 1/2 water supply line to the house, or change?

The well pumps in with a 1inch, to the pressure tank, then on to the rest of the house with 1/2 inch. Would I get more water flow with a 1 in line, to the water softener, but where to size down? Or replace all of it with 1 inch PEC line? It currently is 1/2 inch copper with 192 soldered connections. Will the flow increase enough to warrant all that effort? We are currently used to the pressure and flow. I am just getting ready to replace the 1/2 in as it is failing and needs replacement not just repair. I will be putting in instant heat water heaters for the sinks and showers. Can size them to what is needed.

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