On the topic of weight:
What would a modern V10 engined car, with halo and the 80kg driver/seat combo look like in weight?
https://www.f1technical.net/forum/viewtopic.php?t=28901
1995 595 kg
2009 605 kg Optional KERS weight 30kg... 20kg of which to fit within existing ballast provision?
2010 620 kg
2013 642 kg Last year of V8 engines
2014 691 kg First year of hybrid V6 engines
2015 702 kg Adjustment for second hybrid year
2017 728 kg Wider wheels and tyres
2018 734 kg Halo introduced
2019 743 kg 80kg driver/seat allowance; halo 'correction'; new wing regulations; rear wing lights
2020 746 kg Agreed-upon adjustment, plus second fuel flow meter 2022 768 kg New rules, including heavier standard parts
So if we take the 605 kg of the V8.
Than add 10 kg for the V10 and the required slightly stronger drivetrain.
Than add 15 kg for the HALO, the 80 kg driver/seat and rear wing lights (743 - 728 kg)
Add a kilo for the 2nd fuel meter
Than add 10 kg to allow cheaper parts.
We end up at 641kg minimum weight. In other words 127 kg (!) lighter than the 2022 regulations.
Now of course this means a much shorter and narrower car with lighter wheels and tyres like before 2017, but I feel that would only beneficiary to the driving and racing.