It really depends on your local and your individual circumstances:

For instance go on election day is easier if:

• you have lots of polling places (eg elementary schools) but if like in places with few polls, loooong lines.

• if using all paper ballots, go election day np; if only electronic or print-on-demand, and if there's a "problem" on election day, looooong lines.

• If you live in a very safe community, np going on election day; if live in a very unsafe community, might want to early.

• If you can physically wait in line for hours, going election day not so bad, but if you cant (for health or busy life/family/work reasons) than might go early.

• Also varies by the "rules" on if you've had a ballot mailed to you yet, which might be easier; including election day drop offs at the polls (if allowed, some states wont allow DUMB, etc.)

Also your community makeup; so if you say have lots of people like seniors who come out election day, well maybe you want to too, or maybe you want to save them some time in line by going early. Some places always have lines, others never have lines.

Going Election Day is generally best for lowering the risks of shenaigans of ballots.

One more advantage to voting early, is it means on Election Day you're free to help call, drive, etc. to get others to the polls, or pollwatch another location.

Can you vote just one day early? The concern of voting too early is that if you're in a precinct dominated by Dems, then fraud is a lot easier if they know the votes they need to counteract.