I just can't seem to remember this word. Please help me, thank you so much
Another word for a temporary solution is stopgap. Cambridge:
(n) something intended for temporary use until something better or more suitable can be found.
It's given as a noun, but is very commonly used as a noun adjunct, in phrases like "stopgap solution", as can be seen fronm the examples in the dictionary I linked.
How about provisional?
1 arranged for the present time only and likely to be changed in the future Synonym temporary. A provisional government. Provisional arrangements
2 arranged, but not yet definite. The booking is only provisional.
I would suggest using replaceable
- able to be replaced.
‘These are all temporary and replaceable items.’
How about obsolete:
no longer used because something new has been invented
Another word with pretty similar meanings in IT only is deprecated:
be deprecated (computing) (of a software feature) to be considered outdated and best avoided, even though you can still use it, usually because it has been replaced with a newer feature
- A number of features have been deprecated in the latest version of the software.
Here you can see a real life example where both words are used together:
computes variance-covariance matrix This function is obsolete.
I would say stopgap
something that you use or do for a short time while you are looking for something better
- The arrangement was only intended as a stopgap.
- a stopgap measure
Approaching this from another angle:
If an item is upgradable then it has been designed with the intent that it can be replaced when or if a better alternative becomes available - whether or not a "better" version actually exists at the moment.