As a protestant, I waver sometimes about how I feel about the Reformation.
It sometimes bothers me that the Reformation occurred because I believe the verses in John about unity, and the Reformation definitely severed the central unity the Church had up until that time. As a result, Christendom has split into countless denominations, which I don’t believe even was the intent of the Reformers. It’s gotten out of hand and division weakens Christianity, in my opinion.
However, part of me also sees some positives to the Reformantion. I will sum it up in one word, “
Competition”. I view competition as something that is generally a good thing. Let me explain.
Would we have as nice of cars today if Ford was still the lone car maker? I doubt it. At one point when they were the lone car maker, you could have any car you wanted so long as it was a black Edsel.

The competition from GM, Chrysler, Toyota, Honda, etc, has arguably made Ford into a more fit and strong company, in my view.
I also think that the US Postal Service has improved since Federal Express, UPS, and others have entered the marketplace. I think McDonalds is better because of Burger King and Subway.
In the same way, I think one positive by-product of the Reformation is that it has helped keep the Catholic Church of today *on message *and strong. It also has helped Catholics to get to know their faith and to defend their faith more than would have been the case in a predominantly Catholic nation, like Spain.
I think protestants can learn things of value from the Catholic Church and viceversa. For example, I think the CC would be wise to study and learn how a lot of protestant churches greet visitors and help them feel welcome. I think some protestant worship music is also wonderful and worshipful.
On the other hand, I think Protestants can learn a lot from Catholics on a variety of subjects, such as Church history. Yes, there were some meaningful things that happened in between the end of the New Testament and Martin Luther

and some special people of faith who were our Church fathers who we can learn a lot from and be inspired by. All of them were Catholics.
Most of the time, like the OP, I don’t even concern myself with the Reformation because it was so long ago and most protestants have moved on and are more concerned with their relationship with God and getting help and instruction from the Lord and their local church in how to live a more godly Christian life – the same as modern Catholics.
I am a big proponent of ecumenism because Catholics and Prostestants share a common enemy – Satan and the powers of darkness – and we need to team up to combat it, in my view, and not view each other as the enemy. That is one of the reasons I came to CAF in the first place.