I’m 99.99% sure that it still is. The 0.01% that I’m allowing for, would be for something like a phase shift.
The lifespans of stars are hydrogen-dependent, whereas those of black holes aren’t. It seems to me that supermassive black holes, such as the one at the center of M87, can offset some of their black-body evaporation by taking material from objects that fall into their accretion disks.
Being the engines and probably the creators of their surrounding galaxies, these objects are at least as old as and will probably outlive their respective galactic homes.
Even so, it’s estimated that red dwarf stars can live for about 10 trillion years. So if an object that needs a hydrogen fuel supply can live that long, I can only imagine the lifespan of an object that doesn’t need one, and can replenish its mass by taking it from nearby orbiters,
Even though Virgo A (one of the names of the supermassive black hole at M87’s center) is at least 13.24 billion years old, it can’t be any older than the age of the universe, which is about 13.772 billion years. Therefore, it’s still alive and will be sucking stellar matter far, far into the future.