Frequently. 2018, 2016, 2015, 2014, 2013, 2009, 2008, 2007, 2006, 2005, 2001 etc
The coaches did a great job addressing the depth issues. Both Williams and Katoa could be capable of rushing for 1000 yards if they become the feature back. Eskupa will likely be the #3 back and adds some welcomed experience to the back up RB corps.
That being said, This is not that different from many of the previous seasons.
2018: A healthy Canada easily eclipses 1000 yards, with 1300 being perfectly reasonable. Had Katoa stayed healthy and had been the primary ball carrier, he would have likely had 1000+ yards. Hadley as the #3 rb averaged 5.3ypc had 6 TDs and added over 100 receiving yards. Oh, and don't forget Braden El-Backri.
2016: SR Jamaal Williams. In the 9 games that Algie Brown started in 2015, he averaged 5.7 ypc and had 11 TDS. It would have been logical to expect a comparable 2016 season if given the chance. Squally Canada is a decent # 3 option.
2015: Hine was very good before he got hurt. He won the starting job in the Nebraska game where he averaged 9.3 ypc and then had 93 yards vs #20 BSU and and 149 yards vs @ 10 UCLA. Algie's stats were mentioned above. Francis Bernard averaged 6.1 ypc and had 6 TDs as well.
2014: Jamaal Williams, Paul Lasike, Algie Brown. Only one 1000 yard rusher this year, but Algie was a year away from being one and Lasike was good enough to have an NFL career (admittedly a rather brief one) after graduating.
2013: Jamaal Williams, Paul Lasike, Algie Brown (and some people add Taysom Hill to that list)
2009: Harvey Unga, JJ Diluigi (over 500 total yards and 7 TDs) and Manase Tonga (8 TDs and Future NFL Fullback)
You get the idea. BYU has had some pretty good RBs over the past 2 decades. I'm not throwing shade on BYU's current RBs, just recognizing the talent and ability of previous classes.