I don't see the problem with driving from Germany to Eurotunnel non-stop. It's max 4h, so a stone throw comparing to longer routes through Europe. Top up fuel in Germany, don't drink Red Bull and there won't be a problem with 4h of straight driving.
Stopping every 2h when driving 1000km route would be a nightmare and awful waste of time. It took me 2.5h today, to drive 20 miles in England. Should I stop on hard shoulder and take a break, because I was stuck in traffic for more than 2h? No services on the route.