Not that anybody has hit! As a user of the card for well over a year, the feed scrolls endlessly until you reach the initial top up.
That home feed is designed much in the same way as a Twitter or Facebook feed. You’re generally expected to be looking somewhere close to the most recent items but can continuously scroll in to the past if you wish. There are various things done in all of these apps to improve performance by only loading and rendering slightly outside what you can see. I haven’t personally seen this be a huge concern unless you’re trying to scroll rapidly on a slower device.
Do let someone on the Android team know (here or through support) if performance starts to become an issue though. While I’m sure the team tries their best to keep things fast, Android in particular has a wide variety of target hardware and software stacks.