What is the 'yo-yo racing' that has been seen in F1 2026?

Formula 1 has embarked on a new era in 2026 with what is arguably its biggest regulation overhaul in history, as both the chassis and power unit have changed. The chassis is now lighter and nimbler with the minimum weight reducing by 32kg, while the power unit features more electrical energy with a near-50:50 split against the internal combustion engine. This has been contentious to say the ...