Anybody purchased or used a Roku streaming stick 4K ? Thinking about getting one . Thanks

2 of my roku's are having trouble staying connected with my internet but the other 3 are fine. i'm assuming these 2 are older.

probably buy a smart tv when i need one. but my 15 year old samsung 52" is still going strong so i cant justify trashing it even though i want that 65"
I was in a similar boat. I just gave my son the old LCD Sony which still works great and pic still looks new and got the new 65" Sony. No regrets.