As long as you make your monthly payments, you can rest at ease, knowing the IRS isn't going to levy your bank accounts or garnish your wages.
Peace of mind
If you don't earn a large income and your financial situation doesn't change over the years, then your monthly tax payment will remain low and eventually expire.
The IRS can increase your monthly payments if you get a nice income boost and start making more.
You aren't actually done dealing with the IRS until the debt expires after 10 years, or you're completely paid. This bothers some more than others.