Seems like the vast majority of folks drive home from the dealer after buying an EV (or before) and immediately install the fastest charging they can get, without really thinking about what they need. There's been some (IMHO) good advice on this forum to wait a month or two after getting your EV, so you understand what your charging needs really are, based on your personal use patterns.
I've had my Bolt for 2 years now, and never bothered to put in a 240V outlet for charging it. I would install a 240V outlet myself for the cost of the wire & breaker, but I just haven't seen the need yet. Most times, it's also not worth the effort to go through the menus to change from 8A to 12A. I work from home, so my car spends many days just sitting in the driveway. During the summer, I drive 90 miles each way to a lake 2-3 weekends each month. When I return from the lake Sunday afternoon, my car will be at 30% charge. It takes a couple long days to get back to full battery, but that's never caused me any grief. It has plenty of range left for any chores I need to do around town, and a couple days later it's full again. If some emergency came up, I would plug in my car to a public L2 charger a few blocks from home and walk home. But that hasn't happened in 2 years. Maybe the pandemic has been a factor, It's hard to say. I DO have a L2 charger which I carry in the back of the Bolt as a "travel charger", but at home I always use the L1 charger that came with the Bolt.
My house was built in 1920. It was upgraded to 200A service at some point, presumably when central air was added. When I got the Bolt, I tapped off an existing branch circuit in my cellar and added a 120V outlet close to the driveway to plug in the OEM charger. I've charged at both 8A and 12A without problems, but am usually just too lazy to change the Bolt's menu to 12A. My living room wasn't built with overhead lighting, so we use lamps plugged into the outlets in the room. That's the same branch circuit I added my charger outlet onto. I believe modern electrical construction guidelines call for the room outlets to be a separate branch circuit than the lights. And I believe this is primarily so the lights don't dim when you start your vacuum cleaner or other appliances - cuz that gives residents the heebee-geebees. But my house was also wired for incandescent lighting, and now it's all LEDs, so by my thinking, that leaves extra capacity on the circuit for charging my Bolt. I've never noticed the lights dim when I plug in my car, but then again I'm out in the driveway when I plug it in!