I have to vary both the direct and indirect routes, varying between 5 miles and 15 miles each way. If I am motivated I find a route that has a fun Strava segment and push hard. Speed varies on whether I take a hilly route and how loaded the bike is. Today I hit three category 4 Strava climbs and had a
PR on one with bits of 20% inclines with 2000' of climbing for the day. I also packed extra clothes today so I could ride a rack less sunny day bike.
i will stretch both morning and evening trips depending on mood and schedule at work. The only drawback is getting sweatier for work.