No, it was mostly because we each had a car and never using both at the same time. The reason of buying a new one is because we wanted to sell the two cars while they had some value. For 2030 the euro 5 engines can't run in Brussels, like now older ones can't be used here, it will probably decrease much their value close to that date.
The Yaris Hybrid being newer one will be still usable at least up to 2034,if we keep it that long. In 2035 they plan to ban gas vehicles in Brussels but we don't know yet if it will really happen (will it be feasible? Quite far to know).
And why a Yaris instead of a 208? Because Peugeot became too expensive, the Yaris Hybrid was at the same price.