Better free ...
You could ask - why exactly open source software? There are many simply freeware programs, aren't they? Not everyone is a developer, not everyone needs the source code... Beside this there are many commercial programs, which are easier to use and have much more possibilities than their respective free analogs. Even more - most probably you can find their "freely available" copies on the Internet, or to take them "for free" from a friend, and again you will not have to pay.
What do you think, is the price of the program the only investment that you make for it? What about the months and the money you spent learning to work with it? And the increasing amount of files that could be open only with this program and no one else? And how about all the additional programs and technique you should buy, because your program is working with nothing else but with the products of the same vendor? The time and emotions spent every day because your program is simply not doing certain things, or is not doing them well, and the awaited new improved version still is not coming? What about the money for update and actualization, for subscribed maintenance and consultations? And all the little habits, born in the everyday work, and the fact that you already know even its smallest defects? In the beginning is easier to change the program, but do you think you would like to do this after 5-10 years or even right after you finally have learned how to work with it?
Think about all this, search out the Internet, ask your friends and you will find many occasions, when big organizations as well as private users are not inclined to change the programs they are using not because they are fully content and because there are no better and beneficial alternatives, but because they could not afford themselves the time and resources to live through the process of adaptation to the new program once again. And therefore they are forced to put up with a bad and formal maintenance, with more and more slavering and unfavorable subscription contracts, with not solved and newly appearing mistakes, with higher and higher requirements of the new versions to the hardware, constraining them to change the technical equipment along with the software, with the increasing feeling of having no choice and being deceived. Until they decide to become free.
So why free software? Because only there you have the guarantee that the program is working for you and not for its producer. Have you ever heard of freeware programs, as well as many others paid ones, containing spy components or Trojan horses? Or about programs that are free until they become really needed and useful and then they are require you to buy them, or worse - they cease to exist? Only with free software you can be sure that you will be always able to open and use your old files, even if you forsake the program itself. Many could promise you that, but only your access to program source code could guarantee guarantee this. There are many other reasons - if you are interested, read here.
Acquiring the program of key position for the work could not be compared to buying a chocolate, which if you don't like, you throw in the garbage and never buy the same kind again. By the degree and the length of its influence this could be rather compared to ... marrying someone.
And you ... reconsider it very well before you get married, don't you?