Also consider "greasing the groove".
You can think of doing big compounds not just as mass/strength-builders, but also as movements to be practiced. If you go to failure on every set, you will be doing a lot of ugly grinders. Occasionally doing a grinder isn't a bad thing, and it's nice to have a feel for what your ability to grind a rep is.
However, making grinders a significant proportion of the reps you do on your compounds is not a good thing. This is basically the equivalent of practicing with bad form. Practicing with good form means your form improves with time (and is better maintained as you approach your max), so you can lift more weight and/or hit your target muscles more effectively. You will not get these benefits by reinforcing bad motor patterns.
Also, frequent grinders means a higher likelihood of injury, which is a HUGE limiter of progress.