Yes—buying a discontinued camera is usually fine if it still meets your needs. Discontinuation generally means the maker is replacing it or no longer sees a reason to keep producing that model, not that the camera suddenly becomes worse.

For the T4i specifically, the community answers note it is very similar to the T5i, so discontinuation alone is not a reason to avoid it. It should still be supported, and image quality does not change just because the model is no longer current.

The main practical downside is simply that it’s an older model, so there may be a newer version available—but if the newer one offers little benefit for how you shoot, the older body can be the better value.

Also, if the lens choice is your main concern, consider buying the body separately and choosing the lens you actually want. In general, lenses can matter as much as or more than small body-to-body upgrades.