Newcastle is an average team in the Premier League that have fairly good players that is why they have experienced this level of growth so far. One thing that makes teams improves is having a good coach that can be able to manage the players in the team and develop them to be world class players and i think Newcastle's coach have been able to produce some quality players in the squad.
As for Nottingham Forest, they are still new to the Premier League with not much experience even though they have got a good run this season but there is no comparison between them and Newcastle because Newcastle is far more experienced because they have been around in the Premier League for a long time. If some of Nottingham Forest notable players signs for bigger club next season the club will face some problems but what will make some of the players to still remain at the club will be when they qualify for the Champions League next season.
Newcastle United is average team which is trying to have in top ranks specially after change of ownership things are getting improvement because at the end of 2023 the ended-on 4th and then at the end of 2024 the ended-on 7th but now again they have good chance of staying into top 5.
Eddie How doing good job with now their squad depth is amazing and Isak is having amazing season it's good time for them to have improvement into their squad which will keep them in balance for staying into top ranks which is surely going to have interesting for them. Premier League is always one of the most competitive and interesting league which make things great for top players around the world so having good spot always great in coming round they are hosting Chelsea this is good interesting game after this visiting Arsenal which is challenging and then Everton which making their chance for top 5 spots.