The phrase "almost impractical" is correct and usable in written English.
It can be used to describe something that is nearly not feasible or very difficult to implement, but not entirely impossible.
Example: "The proposed solution is almost impractical due to the high costs involved."
Alternatives: "nearly unfeasible" or "practically impossible".
Standard approaches of exploring the code compression design space are tedious, time consuming, and almost impractical with the increasing number of proposed compression algorithms.
The high-dimensional space is almost impractical to deal with considering the huge storage and computational cost while processing high-resolution images.
The restrictions "would have made representation almost impractical," said Kelly White, who oversees CAIR's adult detention program and is trying to negotiate with Montgomery officials to help all detained immigrants.
Nevertheless, the same study concluded that it "seemed almost impractical for the incubator to fully address each of the tenant's networking needs according to their industry and business plans" (p. 251).
However, considering that reversing salinized soils is almost impractical especially in developing countries, timely and cost effective methods such as use of GIS and remote sensing to monitor soil salinity, while at the same time monitoring the spatial variation of soil salinity both in time and space may need to be explored, especially in irrigation schemes with intercropping systems.
You think it's almost impractical.
"Providing effective shielding for an entire spacecraft travelling to Mars is almost certainly impractical - it would be too heavy and therefore costly.
Vinyl is more expensive to produce, but is worth more per unit to artists and labels than a Vevo stream, and is almost entirely impractical to pirate — unlike CDs, which beg to be ripped of their digital contents immediately, and lose most of their tangible value afterwards.
Vinyl is more expensive to produce, but is worth more per unit to artists and labels than a Vevo stream, and is almost entirely impractical to pirate unlike CDs, which beg to be ripped of their digital contents immediately, and lose most of their tangible value afterwards.
Simultaneous, multi-parametric measurements are almost always impractical owing to scan time limits and a high sensitivity to the measurement set-up and experimental conditions.
In their article, Barr et al. (2006) claimed that "perfectly random sampling across all relevant factors is therefore almost universally impractical".
