Is Bresenham's Line Drawing algorithm still used today?
Google Scholar reports hundreds of mentions since 2012.

Specifically, the patents


System and method of optical reading employing virtual scan lines (US 20100308114 A1, 2010),
System and method for data reading using raster scanning (US 8286877 B2, 2012) and
Compensated virtual scan lines (US 8335341 B2, 2012)


explicitly mention the algorithm, if only in exemplary fashion.

Further searches, e.g. on YouTube, suggest persisting interest in the algorithm; it still seems to be in the mainstream.

That does, of course, not mean that there are no better ones, or that professional products use it still. But since proprietary devices are usually closed-source, we won't be able to answer that question with confidence.