Opening new credit damages your number.
The ratio does a lot of damage so if you lost a job and needed credit, first, you won't get it and second, the ratio shift that would result from using credit will ruin you quickly.
I've been linking small monthly charges like for netflix, one for Instacart, one for
Amazon, another for store curbside, another for incidentals etc to each card and making the rounds every month to sustain the limits and keep it going.
Back in 2008 when people lost their jobs the banks collapsed everyone's credit limits simultaneously wrecking everyone's credit scores by messing with the ratio of debt to available funds while building in heavy damage points of seeking credit in order to justify banks charging the highest interest possible. Nowadays, I am onto the game & spend a great deal of time experimenting on reverse engineering the algorithms. I make many small payments frequently through the month instead of one big one and do my best to make sure the dollar amount shrinks every month. It is more tricky than you'd think because some banks appear to deliberately hold off on reporting payments so they can report more owed than is owed and that triggers and instant dig in my scores which I watch closely in Annual Credit Reports which is still free once a week or so. Some banks actually seem to be holding off on even showing the charges an inordinate amount of time and push to the end of the month because you can't pay until the charge appears (unless you mail a check) and then with the lag on showing payments received they get to make it look like the consumer is using more than they are. Recently, I was offered an option to link utilities to your score to improve numbers which I did not do but I think many people did & this past year or so I noticed utilities do erratic things with payments so now I keep about a months worth of overpayments on all the utilities, better a credit on my account that showing late. It is such a scam IMO but I'll learn the ropes if I have to. Things are getting more aggressive lately and I suspect this is to drive people's scores lower in order to force higher interest rates on consumers for things like homes and student loan refinancing.
Hold the line if you can but don't let things close unless the costs are high to keep a card, my Spidey senses are tingling.