Almost everything you make, start, or buy will need to be maintained.
What we implement today has to be maintained tomorrow. And, you'll need to maintain it for every day after that; until you quit, leave, or throw it away.
That domain you just bought? You'll need to pay for that every year.
That WordPress site you started? You'll need to install security patches and update plugins nearly every month.
That software integration you built? Every time they update their API, you'll need to update your software.
That newly formed relationship? It's going to need ongoing care and attention to stay healthy.
The things we start will require maintenance; so we should be careful about what we start.